Update android.yml

Try an even more radical upgrade

.github/workflows/android.yml

@@ -12,11 +12,12 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: set up JDK
-      uses: actions/setup-java@v1
+    - uses: actions/setup-java@v4
       with:
-        java-version: 12
+        distribution: 'zulu' # See 'Supported distributions' for available options
+        java-version: '21'
     - name: Grant execute permission for gradlew
       run: chmod +x gradlew
     - name: Build with Gradle