Merge pull request #2485 from nginx-proxy/dependabot/github_actions/docker/build-push-action-6

ci: bump docker/build-push-action from 5 to 6

.github/workflows/build-publish.yml

@@ -81,7 +81,7 @@ jobs:
 
       - name: Build and push the image
         id: docker_build
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           file: Dockerfile.${{ matrix.base }}