Merge branch 'gt-add-mk-support-for-project-settings' into 'master'

Add markdown support information for project settings

See merge request gitlab-org/gitlab-ce!23081

doc/user/project/settings/index.md

@@ -18,6 +18,8 @@ Adjust your project's name, description, avatar, [default branch](../repository/
 
 ![general project settings](img/general_settings.png)
 
+The project description also partially supports [standard markdown](../../markdown.md#standard-markdown). You can use [emphasis](../../markdown.md#emphasis), [links](../../markdown.md#links), and [line-breaks](../../markdown.md#line-breaks) to add more context to the project description.
+
 ### Sharing and permissions
 
 Set up your project's access, [visibility](../../../public_access/public_access.md), and enable [Container Registry](../container_registry.md) for your projects: