Merge branch 'DarrenEastman-master-patch-0c0f' into 'master'

Change header format for the  using instance runners and reset runner reg token documentation section

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/167058



Merged-by: Roshni Sarangadharan <rsarangadharan@gitlab.com>
Co-authored-by: Darren Eastman <deastman@gitlab.com>