old bump_divisor for cartesian/corexy-printer

some people are starting to ask why homing is so slow. this is the old standard hard-coded value.

Marlin/Configuration_adv.h

@@ -178,7 +178,7 @@
 #define X_HOME_RETRACT_MM 5
 #define Y_HOME_RETRACT_MM 5
 #define Z_HOME_RETRACT_MM 2
-#define HOMING_BUMP_DIVISOR {10, 10, 20}  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
+#define HOMING_BUMP_DIVISOR {2, 2, 4}  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME  //if this is defined, if both x and y are to be homed, a diagonal move will be performed initially.
 
 #define AXIS_RELATIVE_MODES {false, false, false, false}