wrapper-validation doesn't have a v4 yet...

Also use the new action name

Author: RedNesto

.github/workflows/pr.yml

@@ -9,4 +9,4 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: gradle/wrapper-validation-action@v4
+      - uses: gradle/actions/wrapper-validation@v3