Merge branch '429512-tex-equations-in-markdown-document-generate-small-scrollbars' into 'master'

TeX equations in Markdown document generate small scrollbars

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/142972



Merged-by: Enrique Alcántara <ealcantara@gitlab.com>
Approved-by: Lee Tickett <ltickett@gitlab.com>
Co-authored-by: Brett Walker <bwalker@gitlab.com>