add: make gradlew executable in release workflow

Author: ptthanh02

.github/workflows/release.yml

@@ -28,6 +28,9 @@ jobs:
       - name: Setup Gradle
         uses: gradle/actions/setup-gradle@v3
 
+      - name: Make gradlew executable
+        run: chmod +x gradlew
+
       - name: Extract version from build.gradle
         id: get_version
         run: |