Add tier badge to GraphQL removed items doc

doc/api/graphql/removed_items.md

@@ -4,7 +4,7 @@ group: Integrations
 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
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-# GraphQL API removed items
+# GraphQL API removed items **(FREE)**
 
 GraphQL is a versionless API, unlike the REST API.
 Occasionally, items have to be updated or removed from the GraphQL API.