Update README.md

Remove old reference to WAN interface

Author: stevejenkins

config.gateway.json/README.md

@@ -10,7 +10,7 @@ Each example file in this folder is a complete and validated `config.gateway.jso
 Enables additional Debian repos on a USG to make installing packages (like nano) easier. After provisioning USG run `sudo apt-get update` via CLI before attempting to install new packages.
 
 ### `force-dns-to-pihole.json` & `force-dns-to-dual-piholes.json`
-Forwards all internal port 53 DNS traffic to a Pi-hole (or two Pi-holes with consecutive IP addresses), preventing LAN devices from using their own hard-coded DNS servers. Replace `eth0` with your USG's **WAN** interface, replace `eth1` with your USG's **LAN** interface, and replace `192.168.0.105` (or `192.168.0.105-192.168.0.106` if using multiple Pi-holes) with your Pi-hole's IP address(es).
+Forwards all internal port 53 DNS traffic to a Pi-hole (or two Pi-holes with consecutive IP addresses), preventing LAN devices from using their own hard-coded DNS servers. Replace `eth1` with your USG's **LAN** interface and replace `192.168.0.105` (or `192.168.0.105-192.168.0.106` if using multiple Pi-holes) with your Pi-hole's IP address(es).
 
 ### `vrrp-dual-routers-usg3.json` & `vrrp-dual-routers-usg4.json`
 Enables the Virtual Router Redundancy Protocol (VRRP) to allow two USG routers on a single network. The two example files show the JSON needed for a USG4 acting as the primary router with a USG3 as a redundant backup. Choose which example file(s) to use depending on your hardware and network setup. Each USG must be in a separate site on the UniFi SDN Controller, both sites need to have the same networks setup in them, and both LAN ports are used on each USG. Contributed by learningman. See https://bit.ly/2MoaFTa.