Add license information to `roles/custom/matrix_playbook_migration/tasks/docker_daemon_options_file_cleanup.yml`

roles/custom/matrix_playbook_migration/tasks/docker_daemon_options_file_cleanup.yml

@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2025 Slavi Pantaleev
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
 ---
 
 # ansible-role-docker creates the Docker daemon options file (`/etc/docker/daemon.json`) when options are set