Merge pull request #462 from jupyterhub/dependabot/github_actions/docker/build-push-action-4

build(deps): bump docker/build-push-action from 3 to 4

Author: consideRatio

.github/workflows/publish.yml

@@ -89,7 +89,7 @@ jobs:
         run: echo "Docker tags ${{ steps.gettags.outputs.tags }}"
 
       - name: Build and push
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v4
         with:
           platforms: linux/amd64,linux/arm64
           push: ${{ startsWith(github.ref, 'refs/tags/') }}