doc: run license builder

License is out of date

PR-URL: #35577
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Beth Griggs <bgriggs@redhat.com>
Reviewed-By: Mary Marchini <oss@mmarchini.me>
Reviewed-By: Shelley Vohr <codebytere@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>

LICENSE

@@ -1059,6 +1059,7 @@ The externally maintained libraries used by Node.js are:
 
 - GYP, located at tools/gyp, is licensed as follows:
   """
+    Copyright (c) 2020 Node.js contributors. All rights reserved.
     Copyright (c) 2009 Google Inc. All rights reserved.
 
     Redistribution and use in source and binary forms, with or without