[Docs] updateCopyright date in NOTICE file

fengzunbao · YinZheng-Sun · commit 04b897cd64f8 · 2023-07-18T21:00:27.000+08:00
diff --git a/NOTICE b/NOTICE
@@ -1,6 +1,6 @@
 PolarDB for PostgreSQL
 
-Copyright (c) 2020, Alibaba Group Holding Limited
+Copyright (c) 2021-2022, Alibaba Group Holding Limited
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
