/usr/share/doc/libgv-php5/changelog.Debian.gz is in libgv-php5 2.36.0-0ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libgv-php5/../libcgraph6/changelog.Debian.gz
/usr/share/doc/libgv-php5/../libcgraph6/changelog.Debian.gz