motorRecord.html: out-of-date PID scaling info for OMS controllers

[kmpeters]

motorRecord.hmtl contains out-of-date information about the PID gain scaling for OMS controllers:

https://github.com/epics-modules/motor/blob/d1ed86f128733070ec720286d1e1fad05e8e8156/docs/motorRecord.html#L2823-L2824

A scaling factor of 32767.0 is used for MAXv controllers:

https://github.com/epics-motor/motorOms/blob/dca9b664904de6378854844882605179663a30e7/omsApp/src/devOmsCom.cc#L450-L457