upgrade to latest gradle github actions version - fix long delay?

Author: IntegralPilot

.github/workflows/ci.yml

@@ -33,7 +33,7 @@ jobs:
         python-version: '3.x'
 
     - name: Set up Gradle
-      uses: gradle/gradle-build-action@v2
+      uses: gradle/actions/setup-gradle@v4
 
     - name: Install dependencies
       run: |