add gradle jar validation to ci

Author: Nava2

.github/workflows/ci.yml

@@ -18,6 +18,8 @@ jobs:
 
       - uses: actions/checkout@v3
 
+      - uses: gradle/wrapper-validation-action@v1
+
       - uses: gradle/gradle-build-action@v2
         with:
           gradle-version: ${{ matrix.gradle-version }}