updated TOC

Author: wtnlee

articles/virtual-wan/TOC.yml

@@ -140,6 +140,8 @@
     items:
     - name: Create a NVA in a virtual hub 
       href: how-to-nva-hub.md
+    - name: Restart a NVA in a virtual hub
+      href: how-to-network-virtual-appliance-restart.md
     - name: Configure DNAT/Internet inbound
       href: how-to-network-virtual-appliance-inbound.md
   - name: Connect a VNet to a virtual hub