Updated TOC for the new page

Author: Sreekanth Iyer (Ushta Te Consultancy Services)

articles/hdinsight/TOC.yml

@@ -170,7 +170,9 @@ items:
       - name: Migrate to granular role-based access for cluster configurations
         href: ./hdinsight-migrate-granular-access-cluster-configurations.md
       - name: Ambari user configs migration
-        href: ./migrate-ambari-recent-version-hdinsight.md  
+        href: ./migrate-ambari-recent-version-hdinsight.md
+      - name: Upgrade to Apache Ranger in Azure HDInsight
+        href: ./hdinsight-ranger-5-1-migration.md   
       - name: Hadoop
         items:
         - name: Motivation and benefits