Add missing copyright

Fixes: f58ce7e
Author-Change-Id: IB#1156402
Signed-off-by: Pawel Boguslawski <[email protected]>

Author: pboguslawski

config/config.sample.php

@@ -3,6 +3,7 @@
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
+ * SPDX-FileCopyrightText: 2025 Informatyka Boguslawski sp. z o.o. sp.k.
  * SPDX-License-Identifier: AGPL-3.0-only
  */