added quotes around the host (home-assistant#3725)

skalavala · fabaff · commit d42ebe699fee · 2017-10-23T09:58:59.000+02:00
Throws "while scanning for the next token found character '@' that cannot start any token" an error without quotes around it.
diff --git a/source/_components/namecheapdns.markdown b/source/_components/namecheapdns.markdown
@@ -24,7 +24,7 @@ To use the component in your installation, add the following to your `configurat
 ```yaml
 # Example configuration.yaml entry
 namecheapdns:
-  host: @
+  host: '@'
   domain: example.com
   access_token: 0123_Dynamic_DNS_Password
 ```
