/usr/share/doc/libqt5webchannel5-dev/changelog.Debian.gz is in libqt5webchannel5-dev 5.9.5-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libqt5webchannel5-dev/../libqt5webchannel5/changelog.Debian.gz