/usr/share/doc/libgv-ruby/changelog.Debian.gz is in libgv-ruby 2.40.1-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libgv-ruby/../libcgraph6/changelog.Debian.gz
/usr/share/doc/libgv-ruby/../libcgraph6/changelog.Debian.gz