🐛 Fix JyersUI Preheat Items (#24060)

Marlin/src/lcd/e3v2/jyersui/dwin.cpp

     #endif // HAS_HEATED_BED
 
     #if HAS_PREHEAT
-      #define _PREHEAT_SUBMENU_CASE(N) case Preheat##N: preheat_submenu(N, item, TEMP_PREHEAT##N); break;
+      #define _PREHEAT_SUBMENU_CASE(N) case Preheat##N: preheat_submenu((N) - 1, item, TEMP_PREHEAT##N); break;
       REPEAT_1(PREHEAT_COUNT, _PREHEAT_SUBMENU_CASE)
     #endif