Merge branch 'dedicated-docs-cert-updates' into 'master'

Update certificate language in Dedicated

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/124372



Merged-by: Achilleas Pipinellis <axil@gitlab.com>
Approved-by: Craig Miskell <cmiskell@gitlab.com>
Co-authored-by: Andrew Thomas <athomas@gitlab.com>