Fix XY homing move away rate

Marlin/src/module/motion.cpp

     #endif
     do_homing_move(axis, -bump
       #if HOMING_Z_WITH_PROBE
-        , MMM_TO_MMS(Z_PROBE_SPEED_FAST)
+        , axis == Z_AXIS ? MMM_TO_MMS(Z_PROBE_SPEED_FAST) : 0.0
       #endif
     );