Update artifact names.

Author: dvc94ch

.github/workflows/release.yml

@@ -17,7 +17,7 @@ jobs:
         - target: x86_64-unknown-linux-gnu
           host: ubuntu-latest
           format: appimage
-          artifact: flutter-app-template-x86_64.AppImage
+          artifact: flutter-app-demo-x86_64.AppImage
 
         - target: x86_64-apple-darwin
           host: macos-latest
@@ -30,7 +30,7 @@ jobs:
         - target: aarch64-linux-android
           host: ubuntu-latest
           format: apk
-          artifact: apk/flutter-app-template.apk
+          artifact: apk/flutter-app-demo.apk
 
         - target: aarch64-apple-ios
           host: macos-latest