/usr/share/doc/libgnome-keyring0-dbg/changelog.Debian.gz is in libgnome-keyring0-dbg 3.8.0-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libgnome-keyring0-dbg/../libgnome-keyring0/changelog.Debian.gz