/usr/share/doc/gir1.2-gtk-vnc-2.0/changelog.Debian.gz is in gir1.2-gtk-vnc-2.0 0.5.0-1ubuntu1.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/gir1.2-gtk-vnc-2.0/../libgvnc-1.0-0/changelog.Debian.gz