Merge branch 'pam/update-code-suggestions-setup-doc' into 'master'

Update Code Suggestions setup doc

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/155426



Merged-by: Jon Glassman <jglassman@gitlab.com>
Approved-by: Allen Cook <acook@gitlab.com>
Approved-by: Jon Glassman <jglassman@gitlab.com>
Co-authored-by: Pam Artiaga <partiaga@gitlab.com>