/usr/share/doc/libcairo2-dev/changelog.Debian.gz is in libcairo2-dev 1.15.10-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libcairo2-dev/../libcairo2/changelog.Debian.gz
/usr/share/doc/libcairo2-dev/../libcairo2/changelog.Debian.gz