Merge pull request #2228 from nginx-proxy/dependabot/github_actions/docker/build-push-action-4

ci: bump docker/build-push-action from 3 to 4

.github/workflows/dockerhub.yml

@@ -67,7 +67,7 @@ jobs:
 
       - name: Build and push the Debian based image
         id: docker_build_debian
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v4
         with:
           context: .
           file: Dockerfile
@@ -129,7 +129,7 @@ jobs:
 
       - name: Build and push the Alpine based image
         id: docker_build_alpine
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v4
         with:
           context: .
           file: Dockerfile.alpine