/usr/share/doc/qtxmlpatterns5-dev-tools/changelog.Debian.gz is in qtxmlpatterns5-dev-tools 5.9.5-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/qtxmlpatterns5-dev-tools/../libqt5xmlpatterns5/changelog.Debian.gz