add oci chart release for robusta

Author: DrFaust92

.github/workflows/release.yaml

@@ -82,7 +82,7 @@ jobs:
         run: ./skaffold build --profile release --file-output=container-ids.json --tag='${{env.RELEASE_VER}}'
 
       - name: Save artifact with tags of built containers
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: container-ids
           path: container-ids.json
@@ -105,7 +105,7 @@ jobs:
           poetry publish --build -u __token__ -p ${{ secrets.PYPI_PROJECT_TOKEN }}
 
       - name: Save artifact with helm chart
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: helm-chart
           path: helm/robusta/
@@ -123,3 +123,15 @@ jobs:
       - name: Upload helm chart
         run: |
           cd helm && ./upload_chart.sh
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Push Helm chart to OCI registry
+        run: |
+          helm package helm/robusta
+          helm push robusta-${{env.RELEASE_VER}}.tgz oci://ghcr.io/${{ github.repository_owner }}/charts