/usr/share/doc/python-gi-dev/changelog.Debian.gz is in python-gi-dev 3.20.0-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/python-gi-dev/../python-gi/changelog.Debian.gz
/usr/share/doc/python-gi-dev/../python-gi/changelog.Debian.gz