Update Slovak translation (#12376)

Marlin/src/lcd/language/language_sk.h

   #define MSG_FILAMENT_CHANGE_PURGE_1         _UxGT("Čakajte prosím")
   #define MSG_FILAMENT_CHANGE_PURGE_2         _UxGT("na vytlačenie")
   #define MSG_FILAMENT_CHANGE_PURGE_3         _UxGT("filamentu")
+  #define MSG_FILAMENT_CHANGE_CONT_PURGE_1    _UxGT("Stlačte tlačidlo")
+  #define MSG_FILAMENT_CHANGE_CONT_PURGE_2    _UxGT("pre dokončenie")
+  #define MSG_FILAMENT_CHANGE_CONT_PURGE_3    _UxGT("vytláčania filam.")
   #define MSG_FILAMENT_CHANGE_RESUME_1        _UxGT("Čakajte prosím na")
   #define MSG_FILAMENT_CHANGE_RESUME_2        _UxGT("obnovenie tlače...")
 #else // LCD_HEIGHT < 4
   #define MSG_ADVANCED_PAUSE_WAITING_1        _UxGT("Kliknite pre pokr.")
   #define MSG_FILAMENT_CHANGE_INIT_1          _UxGT("Čakajte prosím...")
-  #define MSG_FILAMENT_CHANGE_UNLOAD_1        _UxGT("Vysúvanie...")
   #define MSG_FILAMENT_CHANGE_INSERT_1        _UxGT("Vložte a kliknite")
   #define MSG_FILAMENT_CHANGE_HEAT_1          _UxGT("Kliknite pre ohrev")
   #define MSG_FILAMENT_CHANGE_HEATING_1       _UxGT("Ohrev...")
+  #define MSG_FILAMENT_CHANGE_UNLOAD_1        _UxGT("Vysúvanie...")
   #define MSG_FILAMENT_CHANGE_LOAD_1          _UxGT("Zavádzanie...")
   #define MSG_FILAMENT_CHANGE_PURGE_1         _UxGT("Vytlačovanie...")
+  #define MSG_FILAMENT_CHANGE_CONT_PURGE_1    _UxGT("Klik. pre dokonč.")
   #define MSG_FILAMENT_CHANGE_RESUME_1        _UxGT("Pokračovanie...")
 #endif // LCD_HEIGHT < 4