Harbor setting page should not display math
## Summary
Relative MR: [https://gitlab.com/gitlab-org/gitlab/-/merge_requests/94111](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/94111)
When we turn on the `markdown_dollar_math` feature flag. The `help wording` of the harbor settings page incorrectly renders as the TeX math.
We can visit this project to reproduce the problem: [https://gitlab.com/orozot/next.gitlab.com/-/settings/integrations/harbor/edit](https://gitlab.com/orozot/next.gitlab.com/-/settings/integrations/harbor/edit)
## Screenshot

issue