Webhooks.md in mailgun-ruby-1.1.9

- old
+ new

@@ -29,10 +29,10 @@
 
 # Remove a url for a specific webhook
 hook.remove 'my.perfect.domain', 'deliver'
 
 # Remove all webhooks for a domain
-hook.remove 'my.perfect.domain'
+hook.remove_all 'my.perfect.domain'
 ```
 
 More Documentation
 ------------------
 See the official [Mailgun Domain Docs](https://documentation.mailgun.com/api-webhooks.html)