config: Update example configs to use rotation_distance

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

config/sample-multi-mcu.cfg

@@ -25,7 +25,8 @@ pin_map: arduino
 step_pin: ar54
 dir_pin: ar55
 enable_pin: !ar38
-step_distance: .0125
+microsteps: 16
+rotation_distance: 40
 endstop_pin: ^ar3
 position_endstop: 0
 position_max: 200
@@ -35,7 +36,8 @@ homing_speed: 50
 step_pin: ar60
 dir_pin: !ar61
 enable_pin: !ar56
-step_distance: .0125
+microsteps: 16
+rotation_distance: 40
 endstop_pin: ^ar14
 position_endstop: 0
 position_max: 200
@@ -45,7 +47,8 @@ homing_speed: 50
 step_pin: zboard:ar46
 dir_pin: zboard:ar48
 enable_pin: !zboard:ar62
-step_distance: .0025
+microsteps: 16
+rotation_distance: 8
 endstop_pin: ^zboard:ar18
 position_endstop: 0.5
 position_max: 200
@@ -54,7 +57,8 @@ position_max: 200
 step_pin: auxboard:ar26
 dir_pin: auxboard:ar28
 enable_pin: !auxboard:ar24
-step_distance: .002
+microsteps: 16
+rotation_distance: 33.500
 nozzle_diameter: 0.400
 filament_diameter: 1.750
 heater_pin: auxboard:ar10