update readme

Author: mevdschee

README.md

@@ -136,6 +136,6 @@ From the project root:
 
 ## Alternatives
 
-- [Github.com - php-mock/php-mock](https://www.github.com/php-mock/php-mock)
-- [Github.com - mockery/mockery](https://www.github.com/mockery/mockery)
-- [Github.com - php-mock/php-mock-phpunit](https://www.github.com/php-mock/php-mock-phpunit)
+- [php-mock/php-mock](https://www.github.com/php-mock/php-mock)
+- [mockery/mockery](https://www.github.com/mockery/mockery)
+- [php-mock/php-mock-phpunit](https://www.github.com/php-mock/php-mock-phpunit)