Merge branch 'docs-rate-limit-tier' into 'master'

Add Free tier badge to rate limit pages

See merge request gitlab-org/gitlab!59572

doc/user/admin_area/settings/rate_limit_on_issues_creation.md

@@ -5,7 +5,7 @@ group: Project Management
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
 ---
 
-# Rate limits on issue creation
+# Rate limits on issue creation **(FREE SELF)**
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/28129) in GitLab 12.10.
 

doc/user/admin_area/settings/rate_limit_on_notes_creation.md

@@ -5,7 +5,7 @@ group: Project Management
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
 ---
 
-# Rate limits on note creation
+# Rate limits on note creation **(FREE SELF)**
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/53637) in GitLab 13.9.