An `<Legend />` component defines a caption for the `<Fieldset />` component.

This component has no props.

`<Legend />` component example:

```js
import { Form, Fieldset, Legend, Input } from '$PACKAGE_NAME';

<Form>
  <Fieldset>
    <Legend>Register:</Legend>
    Name: <Input type="text" />
    Email: <Input type="text" />
    Date of birth: <Input type="text" />
  </Fieldset>
</Form>
```
