Update README.md

Author: ondrejmirtes

README.md

@@ -4,13 +4,13 @@
 [![Latest Stable Version](https://poser.pugx.org/phpstan/phpstan-mockery/v/stable)](https://packagist.org/packages/phpstan/phpstan-mockery)
 [![License](https://poser.pugx.org/phpstan/phpstan-mockery/license)](https://packagist.org/packages/phpstan/phpstan-mockery)
 
-* [PHPStan](https://github.com/phpstan/phpstan)
+* [PHPStan](https://phpstan.org/)
 * [Mockery](https://github.com/mockery/mockery)
 
 This extension provides the following features:
 
 * Interprets `Foo|\Mockery\MockInterface` in phpDoc so that it results in an intersection type instead of a union type.
-* `Mockery::mock()` and `Mockery::spy()` return an intersection type (see the [detailed explanation of intersection types](https://medium.com/@ondrejmirtes/union-types-vs-intersection-types-fd44a8eacbb)) so that the returned object can be used as both the mock object and the mocked class object.
+* `Mockery::mock()` and `Mockery::spy()` return an intersection type (see the [detailed explanation of intersection types](https://phpstan.org/blog/union-types-vs-intersection-types)) so that the returned object can be used as both the mock object and the mocked class object.
 * `shouldReceive()`, `allows()` and `expects()` methods can be called on the mock object and they work as expected.