/usr/share/doc/libsensors-applet-plugin-dev/changelog.Debian.gz is in libsensors-applet-plugin-dev 3.0.0+git6-0.1ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libsensors-applet-plugin-dev/../libsensors-applet-plugin0/changelog.Debian.gz