Restore a previously removed link

Author: Julie Chen

articles/azure-netapp-files/TOC.yml

@@ -71,8 +71,8 @@
     href: azure-netapp-files-resize-capacity-pools-or-volumes.md
   - name: Develop
     items:
-#    - name: REST
-#      href: azure-netapp-files-develop-with-rest-api.md
+    - name: REST
+      href: azure-netapp-files-develop-with-rest-api.md
     - name: Azure NetApp Files SDKs and CLI tools
       href: azure-netapp-files-sdk-cli.md
     - name: Troubleshoot Azure NetApp Files Resource Provider errors