Update notice (#54)

style95 · web-flow · commit 7157dd35e817 · 2021-06-03T16:47:05.000-04:00
diff --git a/NOTICE.txt b/NOTICE.txt
@@ -1,5 +1,5 @@
 Apache OpenWhisk Runtime Dotnet
-Copyright 2016-2020 The Apache Software Foundation
+Copyright 2016-2021 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).
