fix: preload css modules as style instead of script

[thepassle]

When using native css modules in rollup, the polyfills loader will try to add a preload link for them, e.g.:
<link rel="preload" href="styles-78a368d53d94321d.css" as="script" crossorigin="anonymous" />, should be preloaded as script instead

[changeset-bot]

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Latest commit: 0dfa694

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[thepassle]

Awaiting whatwg/html#8764