Bulk update copyright notices to 2024

Change-Id: I6e6d6adbe427332634e9253b9df6d070b4e1387d
diff --git a/vars/installVoltctl.groovy b/vars/installVoltctl.groovy
index cddb0c5..f76a690 100644
--- a/vars/installVoltctl.groovy
+++ b/vars/installVoltctl.groovy
@@ -1,6 +1,6 @@
 #!/usr/bin/env groovy
 // -----------------------------------------------------------------------
-// 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.