Merge branch...

Merge branch 'eread/add-docs-styleguide-guidance-for-handling-offerings-in-rest-api-docs' into 'master' 

Update documentation style guide to codify some new standards

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/142630



Merged-by: Suzanne Selhorn <sselhorn@gitlab.com>
Approved-by: Suzanne Selhorn <sselhorn@gitlab.com>
Co-authored-by: Evan Read <eread@gitlab.com>