Update license.php

Author: wehowski

public/license.php

@@ -1,5 +1,5 @@
 <?php
 header('Content-Type: text/plain');
-header('Access-Control-Allow-Origin: text/plain');
+header('Access-Control-Allow-Origin: *');
 
 echo file_get_contents(__DIR__.\DIRECTORY_SEPARATOR.'..'.\DIRECTORY_SEPARATOR.'licenses.md');