reuse: fix PHP files to keep declare(strict_types=1) directly after <?php

Co-authored-by: szaimen <42591237+szaimen@users.noreply.github.com>

php/public/index.php

@@ -1,9 +1,8 @@
 <?php
+declare(strict_types=1);
 // SPDX-FileCopyrightText: 2021 Nextcloud GmbH <https://nextcloud.com>
 // SPDX-License-Identifier: AGPL-3.0-only
 
-declare(strict_types=1);
-
 // increase memory limit to 2GB
 ini_set('memory_limit', '2048M');