Updated TOC.yml

Updated TOC.yml

Author: sreekzz

articles/hdinsight-aks/TOC.yml

@@ -171,7 +171,7 @@ items:
     href: ./flink/flink-create-cluster-portal.md
   - name: Tutorials
     items:
-    - name: Application Mode Clusters
+    - name: Application Mode clusters
       href: ./flink/application-mode-cluster-on-hdinsight-on-aks.md
     - name: Configuration management
       href: ./flink/flink-configuration-management.md