Copyright for libxtrx source package in Jammy

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: libxtrx
Upstream-Contact: Sergey Kostanbaev 
Source: https://github.com/xtrx-sdr/libxtrxdsp

Files: *
Copyright: 2017-2019 Sergey Kostanbaev 
License: LGPL-2.1+

Files: debian/*
Copyright: 2019-2020 Sepi Gair 
License: LGPL-2.1+

License: LGPL-2.1+
 This package is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.
 .
 This package 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
 Lesser General Public License for more details.
 .
 You should have received a copy of the GNU Lesser General Public License
 along with this program. If not, see .
 .
 On Debian systems, the complete text of the GNU Lesser General
 Public License can be found in "/usr/share/common-licenses/LGPL-2.1".