feat: Update category for Inspektor Gadget

[mqasimsarfraz]

This change updates the category for existing Inspektor Gadget MCP server entry.

Testing Done

→ task build -- --tools inspektor-gadget
task: [build] go run ./cmd/build --tools inspektor-gadget
[+] Building 0.7s (10/10) FINISHED                                                                                                                                                                                                                                                                                                                                                                  docker:desktop-linux
 => CACHED [internal] load git source https://github.com/inspektor-gadget/ig-mcp-server.git#main                                                                                                                                                                                                                                                                                                                    0.4s
 => [internal] load metadata for gcr.io/distroless/static-debian11:latest@sha256:1dbe426d60caed5d19597532a2d74c8056cd7b1674042b88f7328690b5ead8ed                                                                                                                                                                                                                                                                   0.0s
 => [internal] load metadata for docker.io/library/golang:1.24.2-bullseye@sha256:f0fe88a509ede4f792cbd42056e939c210a1b2be282cfe89c57a654ef8707cd2                                                                                                                                                                                                                                                                   0.0s
 => [builder 1/4] FROM docker.io/library/golang:1.24.2-bullseye@sha256:f0fe88a509ede4f792cbd42056e939c210a1b2be282cfe89c57a654ef8707cd2                                                                                                                                                                                                                                                                             0.0s
 => => resolve docker.io/library/golang:1.24.2-bullseye@sha256:f0fe88a509ede4f792cbd42056e939c210a1b2be282cfe89c57a654ef8707cd2                                                                                                                                                                                                                                                                                     0.0s
 => [stage-1 1/2] FROM gcr.io/distroless/static-debian11:latest@sha256:1dbe426d60caed5d19597532a2d74c8056cd7b1674042b88f7328690b5ead8ed                                                                                                                                                                                                                                                                             0.0s
 => => resolve gcr.io/distroless/static-debian11:latest@sha256:1dbe426d60caed5d19597532a2d74c8056cd7b1674042b88f7328690b5ead8ed                                                                                                                                                                                                                                                                                     0.0s
 => CACHED [builder 2/4] COPY . /ig-mcp-server                                                                                                                                                                                                                                                                                                                                                                      0.0s
 => CACHED [builder 3/4] WORKDIR /ig-mcp-server                                                                                                                                                                                                                                                                                                                                                                     0.0s
 => CACHED [builder 4/4] RUN --mount=type=cache,target=/go/pkg/mod     --mount=type=cache,target=/root/.cache/go-build     CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=amd64 go build       -ldflags="-X main.version=0.0.0 -extldflags '-static'"       github.com/inspektor-gadget/ig-mcp-server/cmd/ig-mcp-server                                                                                                      0.0s
 => CACHED [stage-1 2/2] COPY --from=builder /ig-mcp-server/ig-mcp-server /ig-mcp-server                                                                                                                                                                                                                                                                                                                            0.0s
 => exporting to image                                                                                                                                                                                                                                                                                                                                                                                              0.1s
 => => exporting layers                                                                                                                                                                                                                                                                                                                                                                                             0.0s
 => => exporting manifest sha256:b1fbb114921022eab41e21604f39e4b097bc44dc3057b818cb7398da6cf8f4e9                                                                                                                                                                                                                                                                                                                   0.0s
 => => exporting config sha256:e27d51a1dbf894d7af18b37d9abc8aa638babf6a976cc62817b9e515685a0010                                                                                                                                                                                                                                                                                                                     0.0s
 => => exporting attestation manifest sha256:5d77b022f416638531a2b2e514f1e6581f8272f03a08d410a1828cc5e667d193                                                                                                                                                                                                                                                                                                       0.0s
 => => exporting manifest list sha256:2bbdaf4adadbc13bf2989e79a7ff148d02196d92a6740e514ec6288d2c52204f                                                                                                                                                                                                                                                                                                              0.0s
 => => naming to docker.io/library/check:latest                                                                                                                                                                                                                                                                                                                                                                     0.0s
 => => unpacking to docker.io/library/check:latest                                                                                                                                                                                                                                                                                                                                                                  0.0s
 => => naming to docker.io/mcp/inspektor-gadget:latest                                                                                                                                                                                                                                                                                                                                                              0.0s
 => => unpacking to docker.io/mcp/inspektor-gadget:latest                                                                                                                                                                                                                                                                                                                                                           0.0s

6 tools found.

-----------------------------------------

✅ Image built as mcp/inspektor-gadget

and

→ task validate -- --name inspektor-gadget
task: [validate] go run ./cmd/validate --name inspektor-gadget
✅ Name is valid
✅ Directory is valid
✅ Secrets are valid
✅ License is valid
✅ Icon is valid