/usr/share/doc/cron-apt/examples/config is in cron-apt 0.9.5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | # Configuration for cron-apt. For further information about the possible
# configuration settings see /usr/share/doc/cron-apt/README.gz.
|