Clean up links to/from GitHost
@dblessing can you please update the links on githost.io to point to https://about.gitlab.com/products/hosted-single-tenant/ ?
Right now, it links to https://about.gitlab.com/githost-faq/, which then redirects to https://about.gitlab.com/gitlab-hosted/ .
It probably makes most sense to also deprecate https://about.gitlab.com/gitlab-hosted/, bringing the still relevant content from that page over to the products/hosted-single-tenant page. WDYT?