Merge branch 'pw-ctrt-final-cleanup' into 'master'

Clean up customize.md

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/108652



Merged-by: Diana Logan <dlogan@gitlab.com>
Approved-by: Diana Logan <dlogan@gitlab.com>
Co-authored-by: phillipwells <pwells@gitlab.com>