chore(deps): update sigstore/cosign-installer digest to c56c2d3

Author: renovate[bot]

.github/workflows/release.yml

@@ -70,7 +70,7 @@ jobs:
        # Install the cosign tool except on PR
       # https://github.com/sigstore/cosign-installer
       - name: Install cosign
-        uses: sigstore/cosign-installer@dc72c7d5c4d10cd6bcb8cf6e3fd625a9e5e537da
+        uses: sigstore/cosign-installer@c56c2d3e59e4281cc41dea2217323ba5694b171e
 
       # Login against a container registry
       - name: Log into registry ghcr.io