/usr/share/doc/libosmium2-dev/CHANGELOG.md.gz is in libosmium2-dev 2.13.1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libosmium2-dev/changelog.gz
/usr/share/doc/libosmium2-dev/changelog.gz