Fix debugging docs

Author: X-Coder264

docs/debugging.md

@@ -7,12 +7,12 @@ Before you start you'll need to setup your IDE, the following is an example in P
 Then all you need to do is run the following command:
 
 ```sh
-dev/bin/php-debug vendor/bin/phpunit
+dev/bin/php-debug vendor/bin/simple-phpunit
 ```
 
 If you wish to use a different server name, you can do this with the
 `PHP_IDE_CONFIG` env variable:
 
 ```sh
-PHP_IDE_CONFIG=some_other_name dev/bin/php-debug vendor/bin/phpunit
+PHP_IDE_CONFIG=some_other_name dev/bin/php-debug vendor/bin/simple-phpunit
 ```