Update u_e-80_to_443.md

docs/u_e-80_to_443.md

@@ -4,7 +4,7 @@ Since February the 28th 2017 mailcow does come with port 80 and 443 enabled.
 
 Open `mailcow.conf` and set `HTTP_BIND=0.0.0.0` - if not already set.
 
-Open `data/conf/nginx/site.conf` and add two new server configs at the top of that file:
+Open `data/conf/nginx/site.conf` and add the new server config at the top of that file:
 
 ```
 server {