Example code: error when using recent React and Ink3

Hi,
First thanks for this code example!
I am experiencing issues to make your example running, I get this error message:

```
ERROR Element type is invalid: expected a string (for built-in components) or a
class/function (for composite components) but got: undefined. You likely forgot
to export your component from the file it's defined in, or you might have
mixed up default and named imports.

Check the render method of `Field`.
```

Would you be able to provide a possible source of the issue?

使用较新的 React 和 Ink 3 重现该示例，然后检查 Field 的 render 方法及其组件导入。示例能够在不出现所报告的无效元素类型错误的情况下启动，并且表单能够正确渲染，即表示完成。

由索引模型根据 Issue 内容生成。