Merge branch 'rd/update-gitlab-duo-vulnerability-explanation' into 'master'

Update description of GitLab Duo Vulnerability explanation

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/144943



Merged-by: Jerry Seto <jseto@gitlab.com>
Approved-by: Jerry Seto <jseto@gitlab.com>
Approved-by: Carla Drago <cdrago@gitlab.com>
Co-authored-by: Russell Dickenson <rdickenson@gitlab.com>