MLECO-3583: Update copyright notice according to new guidelines

Change-Id: I0f057b33993e5196a60e52f4fb0c60e09693dcfe
diff --git a/model_conditioning_examples/post_training_quantization.py b/model_conditioning_examples/post_training_quantization.py
index ab535ac..a39be0e 100644
--- a/model_conditioning_examples/post_training_quantization.py
+++ b/model_conditioning_examples/post_training_quantization.py
@@ -1,4 +1,4 @@
-#  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");