Update SK po file

Thanks to @ingbrzy see prusa3d/Prusa-Firmware#4023 (comment)

lang/po/Firmware_sk.po

@@ -1221,7 +1221,7 @@ msgstr "Vyrovnanie podl."
 #: ../../Firmware/ultralcd.cpp:5750 ../../Firmware/ultralcd.cpp:5751
 #: ../../Firmware/ultralcd.cpp:5752 ../../Firmware/ultralcd.cpp:5836
 msgid "Mode"
-msgstr "Mod"
+msgstr "Rezim"
 
 #. MSG_MODE_CHANGE_IN_PROGRESS c=20 r=3
 #: ../../Firmware/ultralcd.cpp:3576
@@ -2134,7 +2134,7 @@ msgstr "TMC UNDERVOLTAGE ERR"
 #. MSG_TM_CAL c=20 r=4
 #: ../../Firmware/ultralcd.cpp:4054
 msgid "Thermal model cal. takes approx. 12 mins. See\nprusa.io/tm-cal"
-msgstr "Výpočet termálny modelu trvá asi 12 min. Pozri\nprusa.io/tm-cal"
+msgstr "Výpočet termálneho modelu trvá asi 12 min. Pozri\nprusa.io/tm-cal"
 
 #. MSG_TM_NOT_CAL c=20 r=4
 #: ../../Firmware/Marlin_main.cpp:1527 ../../Firmware/Marlin_main.cpp:3404