Point to repo for phptesting

phptesting.org returns an HTTP 301 and redirects to this location
anyway.

README.md

 * [GitlabCi](https://about.gitlab.com/product/continuous-integration/) - Let GitLab CI test, build, deploy your code. TravisCi like.
 * [Jenkins](https://jenkins.io/index.html) - A continuous integration platform with [PHP support](http://jenkins-php.org/index.html).
 * [JoliCi](https://github.com/jolicode/JoliCi) - A continuous integration client written in PHP and powered by Docker.
-* [PHPCI](https://www.phptesting.org/) - An open source continuous integration platform for PHP.
+* [PHPCI](https://github.com/dancryer/phpci) - An open source continuous integration platform for PHP.
 * [SemaphoreCI](https://semaphoreci.com/) - A continuous integration platform for open source and private projects.
 * [Shippable](https://www.shippable.com/) - A Docker based continious integration platform for open source and private projects.
 * [Travis CI](https://travis-ci.org/) - A continuous integration platform.