adding back annotation

phpunit 11 seems happy with both an annotation + attribute, and doesn't emit
a deprecation warning for me. This should be backwards and forwards compatible

Author: brettmc

src/EnvironmentVariables.php

@@ -12,6 +12,8 @@ trait EnvironmentVariables
     private $environmentVariables = [];
 
     /**
+     * @after
+     *
      * @return void
      */
     #[\PHPUnit\Framework\Attributes\After]