fix typo (#3437)

Author: zen2do

docs/pages/docs/docs-theme/theme-configuration.mdx

@@ -641,7 +641,7 @@ Options to configure the language dropdown for
 | ---------------------- | ---------------- | ------------------------------------------------------ |
 | i18n[number].locale    | `string`         | Locale from `i18n.locales` field in `next.config` file |
 | i18n[number].name      | `string`         | Locale name in dropdown                                |
-| i18n[number].direction | `'ltl' \| 'rtl'` | Locale writing direction. Default: `ltr`               |
+| i18n[number].direction | `'ltr' \| 'rtl'` | Locale writing direction. Default: `ltr`               |
 
 </Table>