Fix PID autotune timeout (#18352)

Marlin/src/module/temperature.cpp

       #ifndef MAX_CYCLE_TIME_PID_AUTOTUNE
         #define MAX_CYCLE_TIME_PID_AUTOTUNE 20L
       #endif
-      if (((ms - t1) + (ms - t2)) > (MAX_CYCLE_TIME_PID_AUTOTUNE * 60L * 1000L)) {
+      if ((ms - _MIN(t1, t2)) > (MAX_CYCLE_TIME_PID_AUTOTUNE * 60L * 1000L)) {
         TERN_(DWIN_CREALITY_LCD, Popup_Window_Temperature(0));
         TERN_(EXTENSIBLE_UI, ExtUI::onPidTuning(ExtUI::result_t::PID_TUNING_TIMEOUT));
         SERIAL_ECHOLNPGM(STR_PID_TIMEOUT);