Add tier badge

Add Free tier badge to Releases page

doc/user/project/releases/index.md

@@ -5,7 +5,7 @@ group: Release
 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
 ---
 
-# Releases
+# Releases **(FREE)**
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab-foss/-/issues/41766) in GitLab 11.7.