Release documentation fixes

Change-Id: Ia5f81e627d7faea39b1f24d56de7cac9aaf71b27
diff --git a/docs/source/meta/copying.rst b/docs/source/meta/copying.rst
index db081d7..d1e9470 100644
--- a/docs/source/meta/copying.rst
+++ b/docs/source/meta/copying.rst
@@ -2,7 +2,7 @@
 Copyright and License
 =====================
 
-Copyright © 2011-2018 University of California, Los Angeles
+Copyright © 2011-2020 University of California, Los Angeles
 
 ndnSIM is licensed under conditions of GNU General Public License version 3.0 or later
 with permission to be linked with NS-3 codebase (GPL 2.0).