Fix Prusa chopper timing preset

Marlin/src/feature/tmc_util.h

 #define CHOPPER_DEFAULT_19V  { 4,  1, 1 }
 #define CHOPPER_DEFAULT_24V  { 4,  2, 1 }
 #define CHOPPER_DEFAULT_36V  { 5,  2, 4 }
-#define CHOPPER_PRUSAMK3_24V { 4,  1, 4 }
+#define CHOPPER_PRUSAMK3_24V { 3, -2, 6 }
 #define CHOPPER_MARLIN_119   { 5,  2, 3 }
 
 #if ENABLED(MONITOR_DRIVER_STATUS) && !defined(MONITOR_DRIVER_STATUS_INTERVAL_MS)