Copyright for netplan.io source package in Nile V2.0

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: netplan.io
Upstream-Contact: Lukas Märdian 
Source: https://github.com/canonical/netplan

Files: *
Copyright: 2016—2023 Canonical Ltd.
License: GPL-3

Files: debian/*
Copyright:
 2016—2023 Canonical Ltd.
 2018—2023 Andrej Shadura 
License: GPL-3

License: GPL-3
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; version 3.
 .
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 .
 On Debian systems, the complete text of the GNU Lesser General
 Public License version 3 can be found in "/usr/share/common-licenses/GPL-3".