/usr/share/doc/libqt53dquick5/changelog.Debian.gz is in libqt53dquick5 5.9.5+dfsg-0ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libqt53dquick5/../libqt53dcore5/changelog.Debian.gz