Fixing PHP-ML link

README.md

 * [Nmap](https://github.com/willdurand/nmap) - A PHP wrapper around [Nmap](https://nmap.org/).
 * [Pagerfanta](https://github.com/whiteoctober/Pagerfanta) - A pagination library.
 * [PHP PassBook](https://github.com/eymengunay/php-passbook) - A PHP library for iOS PassBook.
-* [PHP-ML](https://github.com/php-ai/php-ml) - A library for Machine Learning in PHP.
+* [PHP-ML](https://github.com/jorgecasas/php-ml) - A library for Machine Learning in PHP.
 * [PHPCR](https://github.com/phpcr/phpcr) - A PHP port of the Java Content Repository (JCR).
 * [PHPStack](http://dunkels.com/adam/phpstack/) - A TCP/IP stack proof of concept written in PHP.
 * [print_o](https://github.com/koriym/print_o) - An object graph visualizer.