Update TOC.yml

Author: cherylmc

articles/vpn-gateway/TOC.yml

@@ -51,7 +51,7 @@
     href: about-site-to-site-tunneling.md
   - name: About zone-redundant gateways for Availability Zones
     href: about-zone-redundant-vnet-gateways.md
-  - name: About migrating classic gateways to Resource Manager
+  - name: Migrate classic gateways to Resource Manager
     href: vpn-gateway-classic-resource-manager-migration.md
   - name: Security
     items: