pp_cms/webApp/common/mail/backend/passwordResetToken-text.php

<?php

/* @var $this yii\web\View */
/* @var $user backend\models\AdminUser */

$resetLink = Yii::$app->urlManager->createAbsoluteUrl(['admin-user/reset-password', 'token' => $user->password_reset_token]);
?>
Hello <?= $user->username ?>,

<?= yii::t('app', 'Follow the link below to reset your password') ?>:

<?= $resetLink ?>