Bulk update copyright notices to 2024

Change-Id: I6e6d6adbe427332634e9253b9df6d070b4e1387d
diff --git a/makefiles/lint/help.mk b/makefiles/lint/help.mk
index 24a5aa1..5852b9c 100644
--- a/makefiles/lint/help.mk
+++ b/makefiles/lint/help.mk
@@ -1,6 +1,6 @@
 # -*- makefile -*-
 # -----------------------------------------------------------------------
-# Copyright 2021-2023 Open Networking Foundation (ONF) and the ONF Contributors
+# Copyright 2021-2024 Open Networking Foundation (ONF) and the ONF Contributors
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.