Fix html rendering in api settings documentation

- Artifacts left behind by a previous merge conflict resolution caused
  a table on the api settings page to render improperly. Removed the
  stray '=======' and fixed the problem.

Resolves: #7784
Signed-off-by: Robert Marshall <rmarshall@gitlab.com>

doc/api/settings.md

@@ -224,7 +224,6 @@ are listed in the descriptions of the relevant settings.
 | `mirror_capacity_threshold`              | integer          | no                                   | **(Premium)** Minimum capacity to be available before scheduling more mirrors preemptively |
 | `mirror_max_capacity`                    | integer          | no                                   | **(Premium)** Maximum number of mirrors that can be synchronizing at the same time. |
 | `mirror_max_delay`                       | integer          | no                                   | **(Premium)** Maximum time (in minutes) between updates that a mirror can have when scheduled to synchronize. |
-=======
 | `pages_domain_verification_enabled`      | boolean          | no                                   | Require users to prove ownership of custom domains. Domain verification is an essential security measure for public GitLab sites. Users are required to demonstrate they control a domain before it is enabled. |
 | `password_authentication_enabled_for_git` | boolean         | no                                   | Enable authentication for Git over HTTP(S) via a GitLab account password. Default is `true`. |
 | `password_authentication_enabled_for_web` | boolean         | no                                   | Enable authentication for the web interface via a GitLab account password. Default is `true`. |