docs: Add missing RenderOptions import (#801)

Author: AdriSolid

docs/react-testing-library/setup.mdx

@@ -79,7 +79,7 @@ export { customRender as render }
 
 ```tsx title="test-utils.tsx"
 import React, { FC } from 'react'
-import { render } from '@testing-library/react'
+import { render, RenderOptions } from '@testing-library/react'
 import { ThemeProvider } from 'my-ui-lib'
 import { TranslationProvider } from 'my-i18n-lib'
 import defaultStrings from 'i18n/en-x-default'