Fixed TOC (for real this time)

Author: msmbaldwin

articles/vpn-gateway/TOC.yml

@@ -44,7 +44,7 @@
       href: ../networking/connectivty-interoperability-data-plane.md?toc=%2fazure%2fvpn-gateway%2ftoc.json    
   - name: Security attributes
     href: vpn-gateway-security-attributes.md
-- name How-to guides
+- name: How-to guides
   items:
   - name: Create and manage a VPN gateway
     items: