Use wrapper validation v4

Author: clayburn

.github/workflows/ci.yml

@@ -46,7 +46,7 @@ jobs:
           distribution: 'zulu'
 
       - name: Validate Gradle wrapper
-        uses: gradle/wrapper-validation-action@v1
+        uses: gradle/actions/wrapper-validation@v4
 
       - name: Build with Gradle
         run: ./gradlew build