Update Starter tiers for Optimize group

doc/user/analytics/code_review_analytics.md

@@ -6,7 +6,7 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 ---
 
 
-# Code Review Analytics **(STARTER)**
+# Code Review Analytics **(PREMIUM)**
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/38062) in [GitLab Starter](https://about.gitlab.com/pricing/) 12.7.
 

doc/user/analytics/merge_request_analytics.md

@@ -5,7 +5,7 @@ group: Optimize
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
 ---
 
-# Merge Request Analytics **(STARTER)**
+# Merge Request Analytics **(PREMIUM)**
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/229045) in [GitLab Starter](https://about.gitlab.com/pricing/) 13.3.
 

doc/user/group/contribution_analytics/index.md

@@ -4,7 +4,7 @@ stage: Manage
 group: Optimize
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
 ---
-# Contribution Analytics **(STARTER)**
+# Contribution Analytics **(PREMIUM)**
 
 > - Introduced in [GitLab Starter](https://about.gitlab.com/pricing/) 8.3.
 > - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/3090) for subgroups in GitLab 12.2.