/usr/share/doc/libsysstat-qt5-0-dev/changelog.Debian.gz is in libsysstat-qt5-0-dev 0.3.1-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libsysstat-qt5-0-dev/../libsysstat-qt5-0/changelog.Debian.gz