Update copyright year in the License Book

Approved-by: Bjorn Munch <[email protected]>

Author: bkandasa

LICENSE

@@ -35,7 +35,7 @@ Licensing Information
    reproduced below and can also be found along with its FAQ at
    http://oss.oracle.com/licenses/universal-foss-exception.
 
-   Copyright (c) 1997, 2020, Oracle and/or its affiliates.
+   Copyright (c) 1997, 2021, Oracle and/or its affiliates.
 
 Election of GPLv2