message: add some ssss to thread setting
diff: @@ -313,7 +313,7 @@ controller.api.messenger_profile.get_messenger_code(2000, function (err, url) {
  ## Thread Settings API
  -Thread setting API is now messenger profile API, it's highly recommended to use profile API instead of thread setting one, however, Botkit thread setting interface still available :
  +Thread settings API is now messenger profile API, it's highly recommended to use profile API instead of thread settings one, however, Botkit thread settings interface still available :
  ```js
  