WordPress - Change password change email

<?php
// WordPress - Change the password change email
// code goes in functions.php for your child theme
add_filter ('password_change_email', 'custom_password_change_email');
function custom_password_change_email( $pass_change_email ) {
  $pass_change_text = $pass_change_email['message'];
  $pass_change_text = str_replace( 'Hi ###USERNAME###', 'Dear Customer', $pass_change_text );
  $pass_change_email['message'] = $pass_change_text;
  return $pass_change_email;
}