Update: upload_artifact to v4 due to deprecation

https://github.blog/changelog/2024-04-16-deprecation-notice-v3-of-the-artifact-actions/

.github/workflows/build-apk.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Set up Java
         uses: actions/setup-java@v2
         with:
-        distribution: "temurin"
+          distribution: 'temurin'
           java-version: 17
 
       - name: install dependencies
@@ -47,7 +47,7 @@ jobs:
           mv -v app-debug.apk "${name}"
 
       - name: upload app
-      uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: audiobookshelf-apk
           path: android/app/build/outputs/apk/debug/*.apk