fixes

Author: asudbring

articles/networking/index.yml

@@ -107,7 +107,7 @@ additionalContent:
         - title: Provide outbound connectivity to a virtual network
           links:
             - text: What is Azure Virtual Network NAT?
-              url: ../virtual-network/nat-gateway/overview.md
+              url: ../virtual-network/nat-gateway/nat-overview.md
             - text: Create and configure NAT gateway resource
               url: ../virtual-network/nat-gateway/tutorial-create-nat-gateway-portal.md
             - text: See more