/usr/share/doc/libkf5notifyconfig-dev/changelog.Debian.gz is in libkf5notifyconfig-dev 5.44.0-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libkf5notifyconfig-dev/../libkf5notifyconfig5/changelog.Debian.gz