Merge branch 'mgibsongl-saml-dot-com-changes' into 'master'

Add note about SAML attribute names to SAML SSO dot com docs

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/127061



Merged-by: Jon Glassman <jglassman@gitlab.com>
Approved-by: Jon Glassman <jglassman@gitlab.com>
Approved-by: Jiovanni Castillo <jcastillo@gitlab.com>
Co-authored-by: Michael Gibson <mgibson@gitlab.com>