/usr/share/doc/libspice-client-gtk-3.0-1/changelog.Debian.gz is in libspice-client-gtk-3.0-1 0.9-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libspice-client-gtk-3.0-1/../libspice-client-glib-2.0-1/changelog.Debian.gz