Mentions related log on Rate limit docs

Requests over the rate limit are logged into `auth.log`

doc/administration/logs.md

@@ -284,13 +284,16 @@ Introduced in GitLab 11.3. This file lives in `/var/log/gitlab/gitlab-rails/impo
 Omnibus GitLab packages or in `/home/git/gitlab/log/importer.log` for
 installations from source.
 
-## `auth.log`
+## `auth.log`
 
 Introduced in GitLab 12.0. This file lives in `/var/log/gitlab/gitlab-rails/auth.log` for
 Omnibus GitLab packages or in `/home/git/gitlab/log/auth.log` for
 installations from source.
 
-It logs information whenever [Rack Attack] registers an abusive request.
+This log records:
+
+- Information whenever [Rack Attack] registers an abusive request.
+- Requests over the [Rate Limit] on raw endpoints.
 
 NOTE: **Note:**
 From [%12.1](https://gitlab.com/gitlab-org/gitlab-ce/issues/62756), user id and username are available on this log.
@@ -334,3 +337,4 @@ installations from source.
 
 [repocheck]: repository_checks.md
 [Rack Attack]: ../security/rack_attack.md
+[Rate Limit]: ../user/admin_area/settings/rate_limits_on_raw_endpoints.md

doc/user/admin_area/settings/rate_limits_on_raw_endpoints.md

@@ -9,7 +9,7 @@ type: reference
 This setting allows you to rate limit the requests to raw endpoints, defaults to `300` requests per minute. 
 It can be modified in **Admin Area > Network > Performance Optimization**.
 
-For example, requests over `300` per minute to `https://gitlab.com/gitlab-org/gitlab-ce/raw/master/app/controllers/application_controller.rb` will be blocked.
+For example, requests over `300` per minute to `https://gitlab.com/gitlab-org/gitlab-ce/raw/master/app/controllers/application_controller.rb` will be blocked. Access to the raw file will be released after 1 minute.
 
 ![Rate limits on raw endpoints](img/rate_limits_on_raw_endpoints.png)
 
@@ -18,3 +18,5 @@ This limit is:
 - Applied independently per project, per commit and per file path.
 - Not applied per IP address.
 - Active by default. To disable, set the option to `0`.
+
+Requests over the rate limit are logged into `auth.log`.