Update README.md

Author: dusterio

README.md

@@ -79,10 +79,10 @@ array(4) {
 
 ```php
 // Default connect timeout is 5 seconds, you can change it to anything you want
-$client->getParser('general')->getReader()->config(['connect_timeout' => 3.14]);
+$previewClient->getParser('general')->getReader()->config(['connect_timeout' => 3.14]);
 
 // Default maximum redirect count is 10, but you can change it too
-$client->getParser('general')->getReader()->config(['allow_redirects' => ['max' => 10]]);
+$previewClient->getParser('general')->getReader()->config(['allow_redirects' => ['max' => 10]]);
 
 // If there is a network error (DNS, connect, etc), we throw ConnectionErrorException
 try {