feat: updated Slovenian translation (#1440)

* Fixed some strings and typos

Checked on demo site and saw some string can be improved.

* Update LocaleSelect.tsx

Native name for language

web/src/components/LocaleSelect.tsx

@@ -36,7 +36,7 @@ const LocaleSelect: FC<Props> = (props: Props) => {
       <Option value="hant">繁體中文</Option>
       <Option value="tr">Turkish</Option>
       <Option value="ko">한국어</Option>
-      <Option value="sl">Slovenian</Option>
+      <Option value="sl">Slovenščina</Option>
     </Select>
   );
 };