Merge branch 'ap-maintenance-mode-img' into 'master'

Crop image of maintenance mode docs

See merge request gitlab-org/gitlab!57489

doc/administration/maintenance_mode/index.md

@@ -67,7 +67,7 @@ The banner can be customized with a specific message.
 
 An error is displayed when a user tries to perform a write operation that isn't allowed.
 
-![Maintenance Mode banner and error message](maintenance_mode_error_message.png)
+![Maintenance Mode banner and error message](img/maintenance_mode_error_message.png)
 
 NOTE:
 In some cases, the visual feedback from an action could be misleading, for example when starring a project, the **Star** button changes to show the **Unstar** action, however, this is only the frontend update, and it doesn't take into account the failed status of the POST request. These visual bugs are to be fixed [in follow-up iterations](https://gitlab.com/gitlab-org/gitlab/-/issues/295197).