Merge pull request #1021 from containerd/dependabot/github_actions/docker/metadata-action-3.8.0

Bump docker/metadata-action from 3.7.0 to 3.8.0

Author: AkihiroSuda

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

@@ -44,7 +44,7 @@ jobs:
       # https://github.com/docker/metadata-action
       - name: Extract Docker metadata
         id: meta
-        uses: docker/metadata-action@v3.7.0
+        uses: docker/metadata-action@v3.8.0
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}