Copyright for nullboot source package in Noble

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: nullboot
Upstream-Contact: ubuntu-devel-discuss@lists.ubuntu.com
Source: https://github.com/canonical/nullboot

Files: *
Copyright: 2021 Canonical Ltd
License: GPL-3.0
 This program is free software: you can redistribute it and/or modify it under
 the terms of the GNU General Public License version 3, as published by the Free
 Software Foundation.
 .
 This program is distributed in the hope that it will be useful, but WITHOUT ANY
 WARRANTY; without even the implied warranties of MERCHANTABILITY, SATISFACTORY
 QUALITY, or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
 License for more details.
 .
 You should have received a copy of the GNU General Public License along with
 this program.  If not, see .
 .
 On Debian systems, the full text of the GNU General Public
 License version 3 can be found in the file
 `/usr/share/common-licenses/GPL-3'.