Adjust project settings CI_JOB_TOKEN section wording

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/156989



Merged-by: Frédéric Caplette <fcaplette@gitlab.com>
Approved-by: Paul Slaughter <pslaughter@gitlab.com>
Approved-by: Daniel Tian <dtian@gitlab.com>
Approved-by: Artur Fedorov <afedorov@gitlab.com>
Approved-by: Frédéric Caplette <fcaplette@gitlab.com>
Reviewed-by: Miranda Fluharty <mfluharty@gitlab.com>
Reviewed-by: Marcel Amirault <mamirault@gitlab.com>
Co-authored-by: Miranda Fluharty <mfluharty@gitlab.com>