Update github workflow actions to v4

Author: bschoening

.github/workflows/build-gradle.yml

@@ -9,9 +9,9 @@ jobs:
 
     steps:
     - name: Checkout project sources
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Setup Gradle
-      uses: gradle/actions/setup-gradle@v3
+      uses: gradle/actions/setup-gradle@v4
     - name: Run build
       run: gradle build