Update main.yml for matrix-client-cinny: fix a copyright year

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

roles/custom/matrix-client-cinny/tasks/main.yml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2022 MDAD project contributors
 # SPDX-FileCopyrightText: 2022 Marko Weltzer
-# SPDX-FileCopyrightText: 2022 Slavi Pantaleev
+# SPDX-FileCopyrightText: 2022 - 2023 Slavi Pantaleev
 #
 # SPDX-License-Identifier: AGPL-3.0-or-later