Comparison page links to cross-project milestone in CE which isn't publicly visible

Reported via https://twitter.com/phortx/status/698147920214892545

‏@phortx @gitlab "Example milestone for GitLab 8.2 with 4 projects" link is not public ;)

Link on this page

"Example milestone for GitLab 8.2 with 4 projects" https://about.gitlab.com/comparison/#gitlab-vs-bitbucket-server

Goes to a page which isn't available to non-logged in users.

https://gitlab.com/groups/gitlab-org/milestones/8-2?title=8.2