Update user/operations_dashboard/index.md

Fix tiers in version history

doc/user/operations_dashboard/index.md

@@ -6,8 +6,8 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 
 # Operations Dashboard **(PREMIUM)**
 
-> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/5781) in [GitLab Ultimate](https://about.gitlab.com/pricing/) 11.5.
-> - [Moved](https://gitlab.com/gitlab-org/gitlab/-/issues/9218) to [GitLab Premium](https://about.gitlab.com/pricing/) in 11.10.
+> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/5781) in GitLab 11.5.
+> - [Moved](https://gitlab.com/gitlab-org/gitlab/-/issues/9218) from GitLab Ultimate to GitLab Premium in 11.10.
 
 The Operations Dashboard provides a summary of each project's operational health,
 including pipeline and alert status.