ci: use flutter distributor (#313)

ui/flutter/pubspec.yaml

@@ -56,16 +56,13 @@ dependencies:
   app_links: ^3.4.2
   uri_to_file: ^0.2.0
   window_manager: ^0.3.4
-  tray_manager:
-    git:
-      url: https://github.com/provokateurin/tray_manager.git
-      ref: fix/libayatana-set-icon-deprecation
   autoscale_tabbarview: ^1.0.2
   share_plus: ^7.1.0
   flutter_form_builder: ^9.1.1
   form_builder_validators: ^9.0.0
   flutter_foreground_task: ^6.1.2
   open_filex: ^4.3.4
+  tray_manager: ^0.2.1
 dev_dependencies:
   flutter_test:
     sdk: flutter