iio: Documentation: fix spelling mistake: "deactived" -> "deactivated"

trivial fix to spelling mistake in iio documentation

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

Documentation/ABI/testing/sysfs-bus-iio

@@ -805,7 +805,7 @@ Description:
 		attribute. E.g. if in_voltage0_raw_thresh_rising_value is set to 1200
 		and in_voltage0_raw_thresh_rising_hysteresis is set to 50. The event
 		will get activated once in_voltage0_raw goes above 1200 and will become
-		deactived again once the value falls below 1150.
+		deactivated again once the value falls below 1150.
 
 What:		/sys/.../events/in_accel_x_raw_roc_rising_value
 What:		/sys/.../events/in_accel_x_raw_roc_falling_value