docs:monitor: Fill in sensors attribute details

The `sensors` attribute contains a list of sensor objects that make up
the fan enclosure object. The sensors are what's monitored to determine
the functional state of the fan.

Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
Change-Id: I9d673efc9ff95d638b9edf68fa0cb45b529657a9
1 file changed