Updated TOC.yml for the pew pages added

Updated TOC.yml for the pew pages added
- name: Subscribe to HDInsight release notes GitHub repo
        href: ./subscribe-to-hdi-release-notes-repo.md
      - name: View the image version of Azure HDInsight cluster
        href: ./view-hindsight-cluster-image-version.md

Author: sreekzz

articles/hdinsight/TOC.yml

@@ -106,6 +106,10 @@ items:
         href: ./hdinsight-hadoop-create-linux-clusters-azure-powershell.md
       - name: Create clusters using REST API
         href: ./hdinsight-hadoop-create-linux-clusters-curl-rest.md
+      - name: Subscribe to HDInsight release notes GitHub repo
+        href: ./subscribe-to-hdi-release-notes-repo.md
+      - name: View the image version of Azure HDInsight cluster
+        href: ./view-hindsight-cluster-image-version.md  
       - name: Cluster creation errors
         href: ./create-cluster-error-dictionary.md
         title: