feat: add Korean translation (#1127)

added Korean translation

web/src/components/LocaleSelect.tsx

@@ -34,6 +34,7 @@ const LocaleSelect: FC<Props> = (props: Props) => {
       <Option value="ru">Русский</Option>
       <Option value="it">Italiano</Option>
       <Option value="hant">繁體中文</Option>
+      <Option value="ko">한국어</Option>
     </Select>
   );
 };