add copyright label

includes/NewSignupPage.class.php

@@ -6,6 +6,7 @@
  * @ingroup Extensions
  * @author Jack Phoenix
  * @copyright Copyright © 2008-2020 Jack Phoenix
+ * @copyright Copyright © 2022-     Qiuwen Baike Contributors
  * @license GPL-2.0-or-later
  */
 class NewSignupPage {

resources/js/NewSignupPage.js

@@ -4,7 +4,7 @@
  * especially on mobile devices.
  *
  * @file
- * @author by Qiuwen Contributors
+ * @copyright Copyright © 2022- Qiuwen Baike Contributors
  */
 // Mandatory check
 (function () {