MLECO-3583: Update copyright notice according to new guidelines

Change-Id: I0f057b33993e5196a60e52f4fb0c60e09693dcfe
diff --git a/scripts/py/gen_audio.py b/scripts/py/gen_audio.py
index e997499..ff33bfb 100644
--- a/scripts/py/gen_audio.py
+++ b/scripts/py/gen_audio.py
@@ -1,6 +1,6 @@
 #!env/bin/python3
 
-#  Copyright (c) 2021 Arm Limited. All rights reserved.
+#  SPDX-FileCopyrightText: Copyright 2021 Arm Limited and/or its affiliates <open-source-office@arm.com>
 #  SPDX-License-Identifier: Apache-2.0
 #
 #  Licensed under the Apache License, Version 2.0 (the "License");