Update Gradle wrapper validation to use gradle/actions/wrapper-validation@v4

The old gradle/wrapper-validation-action is deprecated and was causing CI failures.

Author: thibauult

.github/workflows/gradle-wrapper-validation.yml

@@ -9,4 +9,4 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: gradle/wrapper-validation-action@56b90f209b02bf6d1deae490e9ef18b21a389cd4
+      - uses: gradle/actions/wrapper-validation@v4