Add "Beta"

apps/app/public/static/locales/en_US/translation.json

@@ -154,7 +154,7 @@
   "In-App Notification": "Notifications",
   "AI Assistant": "AI Assistant",
   "Knowledge Assistant": "Knowledge Assistant (Beta)",
-  "Editor Assistant": "Editor Assistant ()",
+  "Editor Assistant": "Editor Assistant (Beta)",
   "original_path": "Original path",
   "new_path": "New path",
   "duplicated_path": "Duplicated path",