Run gradlew check instead of just test.

Author: nedtwigg

.github/workflows/gradle-build.yml

@@ -29,4 +29,4 @@ jobs:
         uses: gradle/wrapper-validation-action@v1
       - name: gradle caching
         uses: gradle/gradle-build-action@v2
-      - run: ./gradlew test
+      - run: ./gradlew check