/usr/share/doc/libkf5akonadicore5abi1/changelog.Debian.gz is in libkf5akonadicore5abi1 4:17.12.3-0ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libkf5akonadicore5abi1/../libkf5akonadiprivate5/changelog.Debian.gz