Merge branch 'docs/rs-fix-changelog-header-level' into 'master'

Fix the header level for the Changelog Arguments documentation

See merge request gitlab-org/gitlab-ce!16158

doc/development/changelog.md

@@ -127,7 +127,7 @@ type:
 If you're working on the GitLab EE repository, the entry will be added to
 `changelogs/unreleased-ee/` instead.
 
-#### Arguments
+### Arguments
 
 | Argument            | Shorthand | Purpose                                                                                                    |
 | -----------------   | --------- | ---------------------------------------------------------------------------------------------------------- |