Fix typo trouble

doc/update/README.md

@@ -70,7 +70,7 @@ sudo gitlab-ctl restart
 Done!
-#### Troube? Check status details
+#### Trouble? Check status details
 ```
 sudo gitlab-ctl status
@@ -324,4 +324,4 @@ gitlab_ci['gitlab_server'] = { "url" => 'http://gitlab.example.com', "app_id" =>
 where `url` is the url to the GitLab instance.
-Make sure to run `sudo gitlab-ctl reconfigure` after saving the configuration.
+Make sure to run `sudo gitlab-ctl reconfigure` after saving the configuration.
\ No newline at end of file