update CI github actions

.github/workflows/build_pull_request.yml

@@ -6,33 +6,23 @@ on:
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v3
 
-    - name: Set up JDK 11
-      uses: actions/setup-java@v3
-      with:
-        java-version: '11'
-        distribution: 'temurin'   # Temurin is a reliable distribution of OpenJDK
+    steps:
+      - uses: actions/checkout@v3
 
-    - name: Grant execute permission for gradlew
-      run: chmod +x ./gradlew
+      - name: Set up JDK 11
+        uses: actions/setup-java@v3
+        with:
+          java-version: '11'
+          distribution: 'temurin'
+          cache: 'gradle'# Add Gradle caching to the setup-java action
 
-    - name: Cache Gradle packages
-      uses: actions/cache@v3
-      with:
-        path: |
-          ~/.gradle/caches
-          ~/.gradle/wrapper
-        key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
-        restore-keys: |
-          ${{ runner.os }}-gradle-
+      - name: Grant execute permission for gradlew
+        run: chmod +x ./gradlew
 
-    - name: Build debug APK
-      run: ./gradlew assembleDebug
+      - name: Build debug APK
+        run: ./gradlew assembleDebug
 
-    - name: Run unit tests
-      run: ./gradlew test
+      - name: Run unit tests
+        run: ./gradlew test