Removes milestone from cluster base domain
Removes milestone from cluster base domain

12.0 milestone was removed from cluster base domain on AutoDevOps
documentation to avoid making fake promises.

mmkassem/gitlabhq,stoplightio/gitlabhq,stoplightio/gitlabhq,stoplightio/gitlabhq,mmkassem/gitlabhq,iiet/iiet-git,iiet/iiet-git,mmkassem/gitlabhq,iiet/iiet-git,mmkassem/gitlabhq,stoplightio/gitlabhq,iiet/iiet-git