/usr/share/doc/connectome-workbench-dbg/changelog.Debian.gz is in connectome-workbench-dbg 1.2.3+git41-gc4c6c90-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/connectome-workbench-dbg/../connectome-workbench/changelog.Debian.gz