Merge pull request containerd#3471 from containerd/dependabot/github_actions/docker/build-push-action-6.8.0

build(deps): bump docker/build-push-action from 6.7.0 to 6.8.0

Author: djdongjin

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

@@ -61,7 +61,7 @@ jobs:
       # Build and push Docker image with Buildx (don't push on PR)
       # https://github.com/docker/build-push-action
       - name: Build and push Docker image
-        uses: docker/build-push-action@v6.7.0
+        uses: docker/build-push-action@v6.8.0
         with:
           context: .
           platforms: linux/amd64,linux/arm64