[bug] Js story doesn't render tick blocks with '${}' properly

This code in a `page.rocket.md` file:

```
```js story
import {html} from '@mdjs/mdjs/preview';
const hey = 'hey';

export const StoryPreview = () => html` Use ${hey} in Rocket! `;
```
```

Is rendered like this in the final html

`Use ${hey} in Rocket!`

I would expect for it to render like this:

`Use hey in Rocket!`