ci: fix build env

ui/flutter/pubspec.yaml

@@ -56,7 +56,10 @@ dependencies:
   app_links: ^3.4.2
   uri_to_file: ^0.2.0
   window_manager: ^0.3.4
-  tray_manager: ^0.2.0
+  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
   open_file: ^3.3.2