Fix nesting of free code quality feature

doc/user/project/merge_requests/code_quality.md

@@ -379,7 +379,7 @@ After the Code Quality job completes:
 - The full list of code quality violations generated by a pipeline is shown in the
   Code Quality tab of the Pipeline Details page. **(PREMIUM)**
 
-### Generating an HTML report
+## Generate an HTML report
 
 In [GitLab 13.6 and later](https://gitlab.com/gitlab-org/ci-cd/codequality/-/issues/10),
 it is possible to generate an HTML report file by setting the `REPORT_FORMAT`