/usr/share/doc/libroot-montecarlo-vmc-dev/changelog.Debian.gz is in libroot-montecarlo-vmc-dev 5.34.30-0ubuntu8.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libroot-montecarlo-vmc-dev/../libroot-core5.34/changelog.Debian.gz