Update gradle/actions action to v6

Author: renovate[bot]

.github/workflows/build.yml

@@ -28,7 +28,7 @@ jobs:
           distribution: ${{ env.JAVA_DISTRIBUTION }}
 
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@v5
+        uses: gradle/actions/setup-gradle@v6
 
       - name: Build and Test
         run: ./gradlew test