/usr/share/doc/libp11-2-dbg/changelog.Debian.gz is in libp11-2-dbg 0.2.8-3ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libp11-2-dbg/../libp11-2/changelog.Debian.gz
/usr/share/doc/libp11-2-dbg/../libp11-2/changelog.Debian.gz