Issue #561: updating copyright message

Signed-off-by: blesson-james <blesson_james@Dellteam.com>

roles/k8s_common/vars/main.yml

@@ -1,4 +1,4 @@
-#  Copyright 2020 Dell Inc. or its subsidiaries. All Rights Reserved.
+#  Copyright 2021 Dell Inc. or its subsidiaries. All Rights Reserved.
 #
 #  Licensed under the Apache License, Version 2.0 (the "License");
 #  you may not use this file except in compliance with the License.
@@ -24,4 +24,4 @@ k8s_conf_dest: /etc/sysctl.d/
 
 k8s_repo_file_mode: 0644
 
-k8s_conf_file_mode: 0644
+k8s_conf_file_mode: 0644