Fix lighthous typo (#122)

Author: IanVS

docs/config/lighthouse.mdx

@@ -178,7 +178,7 @@ lighthouse:
     '10.0.0.0/8': true
 ```
 
-## lighthous.advertise_addrs
+## lighthouse.advertise_addrs
 
 `advertise_addrs` are routable addresses that will be included along with discovered addresses to report to the
 lighthouse. The format is "ip:port". `port` can be `0`, in which case the actual listening port will be used in its