update notice year 2023 (#100)

diff --git a/NOTICE b/NOTICE
index c395c35..455851e 100644
--- a/NOTICE
+++ b/NOTICE
@@ -1,5 +1,5 @@
 Apache Liminal
-Copyright 2020-2021 The Apache Software Foundation
+Copyright 2020-2023 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).