/usr/share/doc/libkf5akonadicore-bin/changelog.Debian.gz is in libkf5akonadicore-bin 4:15.12.3-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libkf5akonadicore-bin/../libkf5akonadiwidgets5/changelog.Debian.gz