Update copyright year on generated files

libcef_dll/cpptoc/web_plugin_unstable_callback_cpptoc.h

@@ -1,4 +1,4 @@
-// Copyright (c) 2020 The Chromium Embedded Framework Authors. All rights
+// Copyright (c) 2021 The Chromium Embedded Framework Authors. All rights
 // reserved. Use of this source code is governed by a BSD-style license that
 // can be found in the LICENSE file.
 //
@@ -9,7 +9,7 @@
 // implementations. See the translator.README.txt file in the tools directory
 // for more information.
 //
-// $hash=3cd5a5c45b499f6bd65776affa5bab00d7994678$
+// $hash=6154c085fda09c2a369f3e7da73e6b63858bf919$
 //
 
 #ifndef CEF_LIBCEF_DLL_CPPTOC_WEB_PLUGIN_UNSTABLE_CALLBACK_CPPTOC_H_