Merge branch 'docs/fix-broken-legacy-registration-link' into 'master'

Fix new creation workflow legacy-compatible registration process link

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/135382



Merged-by: Fiona Neill <fneill@gitlab.com>
Approved-by: Fiona Neill <fneill@gitlab.com>
Co-authored-by: Erran Carey <ecarey@gitlab.com>