Update Slovak translation (#12991)

Marlin/src/lcd/language/language_sk.h

 #define MSG_PREHEAT_2_SETTINGS              MSG_PREHEAT_2 _UxGT(" nast.")
 #define MSG_PREHEAT_CUSTOM                  _UxGT("Vlastné zahriatie")
 #define MSG_COOLDOWN                        _UxGT("Schladiť")
+#define MSG_LASER_MENU                      _UxGT("Nastavenie lasera")
+#define MSG_LASER_OFF                       _UxGT("Vypnúť laser")
+#define MSG_LASER_ON                        _UxGT("Zapnúť laser")
+#define MSG_LASER_POWER                     _UxGT("Výkon lasera")
+#define MSG_SPINDLE_REVERSE                 _UxGT("Spät. chod vretena")
 #define MSG_SWITCH_PS_ON                    _UxGT("Zapnúť napájanie")
 #define MSG_SWITCH_PS_OFF                   _UxGT("Vypnúť napájanie")
 #define MSG_EXTRUDE                         _UxGT("Vytlačiť (extr.)")
 #define MSG_TOOL_CHANGE_ZLIFT               _UxGT("Zdvihnúť Z")
 #define MSG_SINGLENOZZLE_PRIME_SPD          _UxGT("Primárna rýchl.")
 #define MSG_SINGLENOZZLE_RETRACT_SPD        _UxGT("Rýchl. retrakcie")
+#define MSG_NOZZLE_STANDBY                  _UxGT("Záložná tryska")
 #define MSG_FILAMENTCHANGE                  _UxGT("Vymeniť filament")
 #define MSG_FILAMENTLOAD                    _UxGT("Zaviesť filament")
 #define MSG_FILAMENTUNLOAD                  _UxGT("Vysunúť filament")
   #define MSG_FILAMENT_CHANGE_CONT_PURGE_1  _UxGT("Klik. pre dokonč.")
   #define MSG_FILAMENT_CHANGE_RESUME_1      _UxGT("Pokračovanie...")
 #endif // LCD_HEIGHT < 4
+#define MSG_TMC_DRIVERS                     _UxGT("Ovládače TMC")
+#define MSG_TMC_CURRENT                     _UxGT("Prúd ovládača")
+#define MSG_TMC_HYBRID_THRS                 _UxGT("Hybridný prah")
+#define MSG_TMC_HOMING_THRS                 _UxGT("Bezsenzor. domov")
+#define MSG_TMC_STEPPING_MODE               _UxGT("Režim krokovania")
+#define MSG_TMC_STEALTH_ENABLED             _UxGT("StealthChop zapnutý")