Added info to seeEmailIsSent about stopFollowingRedirects

Please fix the link markup - I'm not sure whether it should be Markdown or HTML...

Author: ThomasLandauer

src/Codeception/Module/Symfony.php

@@ -454,6 +454,9 @@ public function seeInCurrentRoute($routeName)
     /**
      * Checks if the desired number of emails was sent.
      * If no argument is provided then at least one email must be sent to satisfy the check.
+     * The email is checked using Symfony's profiler. If your app performs a redirect after sending the email,
+     * you need to tell Codeception to not follow this redirect, using REST Module's `stopFollowingRedirects()`:
+     * https://codeception.com/docs/modules/REST#stopFollowingRedirects
      *
      * ``` php
      * <?php