Merge branch 'update-sd-blueprint' into 'master'

Updates to Secret Detection blueprint

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/139816



Merged-by: Dylan Griffith <dyl.griffith@gmail.com>
Approved-by: Dylan Griffith <dyl.griffith@gmail.com>
Approved-by: Ahmed Hemdan <ahemdan@gitlab.com>
Reviewed-by: Ahmed Hemdan <ahemdan@gitlab.com>
Co-authored-by: Lucas Charles <lcharles@gitlab.com>
Co-authored-by: Lucas Charles <me@lucascharles.me>