Copyright for csstidy source package in Jammy

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: CSSTidy
Upstream-Contact: Florian Schmitz 
Source: http://csstidy.sourceforge.net

Files: *
Copyright: 2005, 2006 Florian Schmitz 
License: GPL-2

Files: debian/*
Copyright: 2007 Kevin Coyner 
License: GPL-2

License: GPL-2
 On Debian systems, the complete text of the GNU General Public
 License, version 2, can be found in the file
 `/usr/share/common-licenses/GPL-2'.