prepare for breaking separator change

GitLab will soon remove deprecated routes that lack a clear
dash-separator to tell groups or project name and page apart. Let's
prepare for this breaking change already.

See this GitLab issue for details:
https://gitlab.com/gitlab-org/gitlab/-/issues/214217
2 jobs for master in 15 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #2817906
pages

00:00:15

 
  Deploy
passed pages:deploy

00:00:00