400 Z steps-per-mm (#20104)

Marlin/Configuration.h

@@ -748,7 +748,7 @@
  * Override with M92
  *                                      X, Y, Z, E0 [, E1[, E2...]]
  */
-#define DEFAULT_AXIS_STEPS_PER_UNIT   { 80, 80, 4000, 500 }
+#define DEFAULT_AXIS_STEPS_PER_UNIT   { 80, 80, 400, 500 }
 
 /**
  * Default Max Feed Rate (mm/s)