Add tier label to Jira configuration page

doc/integration/jira/configure.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
 ---
 
-# Configure the Jira integration in GitLab
+# Configure the Jira integration in GitLab **(FREE)**
 
 You can set up the [Jira integration](index.md#jira-integration)
 by configuring your project settings in GitLab.