Settings language add description (#294)

* Add translation notice to language setting

* Make local source guide link readable in dark mode

src/screens/SourceMangas.tsx

@@ -19,6 +19,7 @@ import SourceGridLayout from 'components/source/GridLayouts';
 import { useLibraryOptionsContext } from 'components/context/LibraryOptionsContext';
 import { IManga, IMangaCard, ISource, ISourceFilters } from 'typings';
 import { useTranslation } from 'react-i18next';
+import Link from '@mui/material/Link';
 
 interface IPos {
     position: number;
@@ -227,9 +228,9 @@ export default function SourceMangas({ popular }: { popular: boolean }) {
             messageExtra = (
                 <>
                     <span>{t('source.local_source.label.checkout')} </span>
-                    <a href="https://github.com/Suwayomi/Tachidesk-Server/wiki/Local-Source">
+                    <Link href="https://github.com/Suwayomi/Tachidesk-Server/wiki/Local-Source">
                         {t('source.local_source.label.guide')}
-                    </a>
+                    </Link>
                 </>
             );
         }