Merge branch 'fix-blob-viewer-code-block-font' into 'master'

Respect inherited font-size in markdown code block

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/142882



Merged-by: Olena Horal-Koretska <ohoralkoretska@gitlab.com>
Approved-by: Lee Tickett <ltickett@gitlab.com>
Approved-by: Dan Mizzi-Harris <dmizzi-harris@gitlab.com>
Approved-by: Miguel Rincon <mrincon@gitlab.com>
Approved-by: Olena Horal-Koretska <ohoralkoretska@gitlab.com>
Co-authored-by: Tan Le <tle@gitlab.com>