Add OnPidTuning event to Malyan LCD (#17143)

All ExtUI LCDs need to keep up with ExtUI API changes.

Marlin/src/lcd/extui_malyan_lcd.cpp

@@ -483,6 +483,7 @@ namespace ExtUI {
   void onLoadSettings(const char*) {}
   void onConfigurationStoreWritten(bool) {}
   void onConfigurationStoreRead(bool) {}
+  void OnPidTuning(const result_t) {}
 }
 
 #endif // MALYAN_LCD