MLECO-3583: Update copyright notice according to new guidelines

Change-Id: I0f057b33993e5196a60e52f4fb0c60e09693dcfe
diff --git a/scripts/py/templates/header_template.txt b/scripts/py/templates/header_template.txt
index 0dac4be..f6e3bdb 100644
--- a/scripts/py/templates/header_template.txt
+++ b/scripts/py/templates/header_template.txt
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) {{year}}, Arm Limited and affiliates.
+ * SPDX-FileCopyrightText: Copyright {{year}}, Arm Limited and affiliates.
  * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");