/usr/share/doc/rygel-gst-launch/changelog.Debian.gz is in rygel-gst-launch 0.36.1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/rygel-gst-launch/../librygel-core-2.6-2/changelog.Debian.gz