MLECO-3583: Update copyright notice according to new guidelines

Change-Id: I0f057b33993e5196a60e52f4fb0c60e09693dcfe
diff --git a/tests/common/PlatformMathTests.cpp b/tests/common/PlatformMathTests.cpp
index c07cbf1..9236300 100644
--- a/tests/common/PlatformMathTests.cpp
+++ b/tests/common/PlatformMathTests.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021 - 2022 Arm Limited. All rights reserved.
+ * SPDX-FileCopyrightText: Copyright 2021 - 2022 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");