Added `<?php` to README so pygments sees it as PHP code

README.md

@@ -32,6 +32,7 @@ To use the client, your application must require the `vendor/autoload.php` file
 ### Sending a request
 
 ```php
+<?php
 use edu\wisc\services\cbs\api\Product;
 use edu\wisc\services\cbs\client\ProductServiceSoapClient;