/usr/share/doc/libpoppler-qt5-dev/changelog.Debian.gz is in libpoppler-qt5-dev 0.24.5-2ubuntu4.17.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libpoppler-qt5-dev/../libpoppler44/changelog.Debian.gz