updating copyright year in top-level license file

Signed-off-by: Karl W. Schulz <karl.schulz@amd.com>

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2022 Advanced Micro Devices, Inc. All Rights Reserved.
+Copyright (c) 2021 - 2023 Advanced Micro Devices, Inc. All Rights Reserved.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal