font-display in nuxt.config.ts not respected

Hello - I have the following in `nuxt.config.ts`

```
fonts: {
    families: [
      {
        name: 'My Font',
        provider: 'local',
        weights: ['200', '300', '400', '500', '600', '700', '800', '900'],
        display: 'optional',
      },
    ],
  }
```

When I inspect the @font-face created in the style section of my document, I can see `font-display: swap`. I'm on version `0.11.3`.