Add code to handle changes to zprobe_zoffset

Marlin/Marlin.h

@@ -317,6 +317,7 @@ float code_value_temp_diff();
 
 #if HAS_BED_PROBE
   extern float zprobe_zoffset;
+  void refresh_zprobe_zoffset(const bool no_babystep=false);
   #define DEPLOY_PROBE() set_probe_deployed(true)
   #define STOW_PROBE() set_probe_deployed(false)
 #endif