Add promote P to PE to the translation file.

gso/translations/en-GB.json

@@ -71,6 +71,7 @@
         "task_send_email_notifications": "Send email notifications for failed tasks",
         "task_create_partners": "Create partner task",
         "task_modify_partners": "Modify partner task",
-        "task_delete_partners": "Delete partner task"
+        "task_delete_partners": "Delete partner task",
+        "promote_p_to_pe": "Promote P to PE"
     }
 }