Update "Gitlab.com only" label to "SaaS only"
Why is this change being made?
We are referring to our SaaS offering as "SaaS" instead of "GitLab.com". GitLab's Releases page should reflect this. See https://gitlab.com/gitlab-org/release-tools/-/issues/498.
Closes https://gitlab.com/gitlab-org/release-tools/-/issues/498