Migrate actions/upload-artifact to v4

Author: yawnoc

.github/workflows/build-debug-apk.yml

@@ -20,7 +20,7 @@ jobs:
           distribution: 'temurin'
           java-version: 17
       - run: ./gradlew clean && ./gradlew assembleDebug
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: app-debug.apk
           path: app/build/outputs/apk/debug/app-debug.apk