custom error message

Author: AdamVe

.github/workflows/code-formatting.yml

@@ -18,5 +18,5 @@ jobs:
           java-version: '17'
 
       - name: Check code formatting
-        run: ./gradlew spotlessCheck
+        run: ./gradlew spotlessCheck || echo "::error title=Format check failed::Run ./gradlew spotlessApply to fix." && exit 1