Allow docker cache to push

Author: Art4

.github/workflows/behat-tests.yml

@@ -28,7 +28,7 @@ jobs:
         uses: docker/build-push-action@v6
         with:
           context: .
-          push: false
+          push: true
           tags: user/app:latest
           cache-from: type=registry,ref=user/app:latest
           cache-to: type=inline