Merge pull request containerd#3684 from containerd/dependabot/github_actions/docker/metadata-action-5.6.1

build(deps): bump docker/metadata-action from 5.5.1 to 5.6.1

Author: AkihiroSuda

.github/workflows/ghcr-image-build-and-publish.yml

@@ -53,7 +53,7 @@ jobs:
       # https://github.com/docker/metadata-action
       - name: Extract Docker metadata
         id: meta
-        uses: docker/metadata-action@v5.5.1
+        uses: docker/metadata-action@v5.6.1
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}