Tweak use of move_z_after_probing

Marlin/src/feature/bedlevel/ubl/ubl_G29.cpp

@@ -757,7 +757,10 @@
       } while (location.x_index >= 0 && --count);
 
       STOW_PROBE();
-      move_z_after_probing();
+
+      #if Z_AFTER_PROBING
+        move_z_after_probing();
+      #endif
 
       restore_ubl_active_state_and_leave();