Update Kalico_Additions.md to remove deprecated fan config option (#789)

I changed the deprecated off_below to the new min_power.

Author: marci-makes

docs/Kalico_Additions.md

@@ -56,7 +56,7 @@
 
 - [`[temperature_fan] control: curve`](./Config_Reference.md#temperature_fan) lets you set a fan curve instead of linear control
 - [`[temperature_fan] reverse: True`](./Config_Reference.md#temperature_fan) will let you control a fan in reverse to temperature control. The lower the temperature, the higher the fan runs.
-- Fans now normalize PWM power within `off_below` and `max_power`, so setting a fan to 10% will get you 10% fan speed within your configured off/max range.
+- Fans now normalize PWM power within `min_power` and `max_power`, so setting a fan to 10% will get you 10% fan speed within your configured min/max range.
 - Dual-loop PID control to accurately manage the bed's temperature while limiting heater power to prevent exceeding a maximum temperature.
 
 ## TMC Drivers