fix: copy built app bundle correctly in macOS CI

.gitea/workflows/swift-macos-arm64.yml

@@ -49,12 +49,12 @@ jobs:
         run: |
           set -eux
           rm -rf artifacts bundle-out
-          mkdir -p artifacts
+          mkdir -p artifacts bundle-out
           app="build/DerivedData/Build/Products/Release/SwiftTrayDemo.app"
           zip_name="swift-window-demo-macos-arm64-run${{ github.run_number }}.zip"
           [ -d "$app" ] || { echo 'No SwiftTrayDemo.app produced'; exit 1; }
           ditto -c -k --sequesterRsrc --keepParent "$app" "artifacts/$zip_name"
-          cp -R "$app" bundle-out
+          ditto "$app" "bundle-out/SwiftTrayDemo.app"
           printf '%s\n' 'SwiftTrayDemo macOS app bundle.' > artifacts/README.txt
 
       - name: Copy latest app to runner desktop