Merge branch 'ps-update-secure-coding-url-spoofing' into 'master'

Update secure coding guide with URL spoof

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/137340



Merged-by: Amy Qualls <aqualls@gitlab.com>
Approved-by: Amy Qualls <aqualls@gitlab.com>
Approved-by: Greg Alfaro <galfaro@gitlab.com>
Co-authored-by: Paul Slaughter <pslaughter@gitlab.com>