upgrade to gradle/actions/wrapper-validation@v3 in the other workflow as well 🙄 (#4378)

missed this in #4374

.github/workflows/populate-gradle-build-cache.yml

@@ -21,7 +21,7 @@ jobs:
           distribution: 'temurin'
 
       - name: Gradle Wrapper Validation
-        uses: gradle/wrapper-validation-action@v2
+        uses: gradle/actions/wrapper-validation@v3
 
       - name: Copy CI gradle.properties
         run: mkdir -p ~/.gradle ; cp .github/ci-gradle.properties ~/.gradle/gradle.properties