Merge branch 'ld-docs-github-importer-clarify-notes-api-limit' into 'master'

Clarify missing notes due to GitHub API limit

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/133653



Merged-by: Evan Read <eread@gitlab.com>
Approved-by: George Koltsov <gkoltsov@gitlab.com>
Approved-by: Evan Read <eread@gitlab.com>
Reviewed-by: Evan Read <eread@gitlab.com>
Co-authored-by: Luke Duncalfe <lduncalfe@eml.cc>