Merge branch 'docs/fix-email-hostname-instructions' into 'master'

Corrected custom email hostname instructions

See merge request gitlab-org/gitlab-ce!31646

doc/user/admin_area/settings/email.md

@@ -34,11 +34,13 @@ This configuration option sets the email hostname for [private commit emails](..
 
 In order to change this option:
 
-1. Go to **Admin area > Settings** (`/admin/application_settings`).
-1. Under the **Email** section, change the **Custom hostname (for private commit emails)** field.
-1. Hit **Save** for the changes to take effect.
+1. Go to **Admin Area > Settings > Preferences** (`/admin/application_settings/preferences`).
+1. Expand the **Email** section.
+1. Enter the desire hostname in the **Custom hostname (for private commit emails)** field.
+1. Click **Save changes**.
 
-NOTE: **Note**: Once the hostname gets configured, every private commit email using the previous hostname, will not get
+NOTE: **Note:**
+Once the hostname gets configured, every private commit email using the previous hostname, will not get
 recognized by GitLab. This can directly conflict with certain [Push rules](../../../push_rules/push_rules.md) such as
 `Check whether author is a GitLab user` and `Check whether committer is the current authenticated user`.