Update route53.markdown (home-assistant#7496)

chrismcneil · fabaff · commit 861e1d60141c · 2018-11-14T10:51:19.000+01:00
Removing 'home." from the base domain. 
Following this configuration previously would create the following entries: vpn.home.yourdomain.com, hassio.home.yourdomain.com, home.home.yourdomain.com. 
Now it will create vpn.yourdomain.com, hassio.yourdomain.com, home.yourdomain.com.
diff --git a/source/_components/route53.markdown b/source/_components/route53.markdown
@@ -72,7 +72,7 @@ route53:
   aws_access_key_id: ABC123
   aws_secret_access_key: DEF456
   zone: ZONEID678
-  domain: home.yourdomain.com
+  domain: yourdomain.com
   records:
     - vpn
     - hassio
