Update TOC - Add nested entry

Author: fcabreramsft

articles/iot-edge/TOC.yml

@@ -59,6 +59,8 @@
       href: how-to-connect-usb-devices.md
   - name: Develop and debugging
     href: tutorial-develop-for-linux-on-windows.md
+  - name: Create a hierarchy of IoT Edge devices
+    href: tutorial-nested-iot-edge-for-linux-on-windows.md
   - name: Troubleshoot
     items:
     - name: Diagnose virtual machine