Merge branch 'update-security-policy-docs' into 'master'

Update policy docs to display required property

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/126602



Merged-by: Russell Dickenson <rdickenson@gitlab.com>
Approved-by: Alan (Maciej) Paruszewski <mparuszewski@gitlab.com>
Approved-by: Russell Dickenson <rdickenson@gitlab.com>
Co-authored-by: Alexander Turinske <aturinske@gitlab.com>