update reference article link CLI

Author: duongau

articles/expressroute/TOC.yml

@@ -236,7 +236,7 @@
   - name: Azure PowerShell
     href: /powershell/module/az.network#expressroute
   - name: Azure CLI
-    href: /cli/azure/azure-cli-reference-for-network
+    href: /cli/azure/network/express-route
   - name: REST
     href: /rest/api/expressroute/
   - name: REST (classic)