Update Slovak language label

Author: dodog

frontend/src/locale/src/lang-list.json

@@ -15,7 +15,7 @@
 		"defaultMessage": "Русский"
 	},
 	"locale-sk-SK": {
-		"defaultMessage": "Slovak"
+		"defaultMessage": "Slovenčina"
 	},
 	"locale-zh-CN": {
 		"defaultMessage": "中文"