Typo fix

Apologies!

Author: case

examples/domainr_search_domain_name_availability.php

@@ -4,7 +4,7 @@
 use \Curl\Curl;
 
 $curl = new Curl();
-$curl->get('https://api/domainr.com/v1/search', array(
+$curl->get('https://api.domainr.com/v1/search', array(
     'client_id' => 'php_curl_class',
     'q' => 'example',
 ));