アイヌ語追加 (#428) (#433)

Reviewed-on: #433
Co-authored-by: miteruzo <miteruzo@naver.com>

frontend/src/mdx-components.test.tsx

@@ -32,7 +32,7 @@ describe ('Help MDX with the application compiler', () => {
     expect (within (table).getAllByRole ('columnheader')).toHaveLength (2)
     expect (within (table).getAllByRole ('cell')).toHaveLength (4)
     expect (within (table).getByRole ('link', { name: 'ヘルプ' }))
-	.toHaveAttribute ('href', '/help/guide')
+	.toHaveAttribute ('href', '/ja/help/guide')
     expect (table.querySelector ('strong')).toHaveTextContent ('強調')
   })
 
@@ -72,6 +72,6 @@ describe ('Help MDX with the application compiler', () => {
     renderWithProviders (<Content/>)
     fireEvent.mouseEnter (screen.getByRole ('link', { name: '内部リンク' }))
     expect (prefetch).toHaveBeenCalledWith (expect.anything (),
-	new URL ('/help/guide', window.location.origin).href)
+	new URL ('/ja/help/guide', window.location.origin).href)
   })
 })