Updated url in readme

Author: jmulford-bw

README.md

@@ -30,7 +30,7 @@ composer require bandwidth/iris
 ## Usage
 
 ```PHP
-$client = new \Iris\Client($login, $password, ['url' => 'https://api.inetwork.com/v1.0/']);
+$client = new \Iris\Client($login, $password, ['url' => 'https://dashboard.bandwidth.com/api/']);
 
 ```