chore: Add SPDX header

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

appinfo/routes.php

@@ -1,25 +1,7 @@
 <?php
 /**
- * @copyright Copyright (c) 2016 Julius Härtl <jus@bitgrid.net>
- *
- * @author Julius Härtl <jus@bitgrid.net>
- * @author Ryan Fletcher <ryan.fletcher@codepassion.ca>
- *
- * @license GNU AGPL version 3 or any later version
- *
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU Affero General Public License as
- *  published by the Free Software Foundation, either version 3 of the
- *  License, or (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU Affero General Public License for more details.
- *
- *  You should have received a copy of the GNU Affero General Public License
- *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
+ * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
  */
 
 return [