/lib/udev/rules.d/95-osinfo.rules is in libosinfo-bin 0.2.12-2ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | SUBSYSTEM=="block", ACTION=="add|change", ENV{ID_FS_TYPE}=="iso9660|udf", \
IMPORT{program}="/usr/bin/osinfo-detect -f env $tempnode"
|