Rhye theme: a quick fix for PHP 8.x error

<?php

// File: /wp-content/themes/rhye/inc/merlin/includes/class-merlin-logger.php
// Lines: 189 – 194

/**
 * Public unserialize method to prevent unserializing of the *Singleton* instance.
 *
 * @return void
 */
public function __wakeup() {}