[CI] Update gradle/wrapper-validation-action to v2

Updates deprecated Node 16 to 20

Author: TobiGr

.github/workflows/ci.yml

@@ -37,7 +37,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - uses: gradle/wrapper-validation-action@v1
+      - uses: gradle/wrapper-validation-action@v2
 
       - name: create and checkout branch
         # push events already checked out the branch