Register errors in constants.go

[rowsto64]

Sensor bias values should be as below

// Sensor Bias Magnitude (Selects the sensor bias current magnitude or the bias resistor)
MODE1_sbmag_none byte = 0b00000000 //No sensor bias current or resistor (default)
MODE1_sbmag_500nA byte = 0b00000001 //0.5-µA sensor bias current
MODE1_sbmag_2µA byte = 0b00000010 //2-µA sensor bias current
MODE1_sbmag_10µA byte = 0b00000011 //10-µA sensor bias current
MODE1_sbmag_50µA byte = 0b00000100 //50-µA sensor bias current
MODE1_sbmag_200µA byte = 0b00000101 //200-µA sensor bias current
MODE1_sbmag_10MΩ byte = 0b00000110 //10-MΩ resistor