Fix CI workflow: Use gradle command for wrapper update

- Use 'gradle' command (from gradle-build-action) instead of './gradlew' for wrapper update
- Move wrapper update before cache step to ensure correct Gradle version is used
- This fixes the issue where ./gradlew wrapper fails because it uses the old wrapper version

Author: gamma

.github/workflows/ci.yml

@@ -34,6 +34,9 @@ jobs:
       - name: Grant execute permission for gradlew
         run: chmod +x gradlew
 
+      - name: Update Gradle wrapper to ${{ matrix.gradle-version }}
+        run: gradle wrapper --gradle-version ${{ matrix.gradle-version }} --no-daemon
+      
       - name: Cache Gradle dependencies
         uses: actions/cache@v3
         with:
@@ -45,9 +48,6 @@ jobs:
             ${{ runner.os }}-gradle-${{ matrix.gradle-version }}-
             ${{ runner.os }}-gradle-
       
-      - name: Update Gradle wrapper to ${{ matrix.gradle-version }}
-        run: ./gradlew wrapper --gradle-version ${{ matrix.gradle-version }} --no-daemon
-      
       - name: Run tests with Gradle ${{ matrix.gradle-version }}
         run: ./gradlew clean test --no-daemon