Fix link to NAT Gateway example in README

Signed-off-by: Jamil <[email protected]>

Author: jamilbk

README.md

@@ -5,7 +5,7 @@ Microsoft Azure.
 
 ## Examples
 
-- [NAT Gateway](./examples/aws/nat-gateway): This example shows how to deploy
+- [NAT Gateway](./examples/nat-gateway): This example shows how to deploy
   one or more Firezone Gateways in a single Azure VNet that is configured with a
   NAT Gateway for egress. Read this if you're looking to deploy Firezone
   Gateways behind a single, shared static IP address on AWS.