Update dependency @sveltejs/adapter-auto to v3

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@sveltejs/adapter-auto (source)	^2.1.1 -> ^3.0.0

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Release Notes

sveltejs/kit (@​sveltejs/adapter-auto)

### [`v3.0.0`](https://togithub.com/sveltejs/kit/blob/HEAD/packages/adapter-auto/CHANGELOG.md#300) [Compare Source](https://togithub.com/sveltejs/kit/compare/@sveltejs/adapter-auto@2.1.1...@sveltejs/adapter-auto@3.0.0) ##### Major Changes - breaking: require SvelteKit 2 ([#​11316](https://togithub.com/sveltejs/kit/pull/11316))

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