Update dependency @sveltejs/kit to v2.7.3

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@sveltejs/kit (source)	2.7.2 -> 2.7.3

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Release Notes

sveltejs/kit (@​sveltejs/kit)

### [`v2.7.3`](https://redirect.github.com/sveltejs/kit/blob/HEAD/packages/kit/CHANGELOG.md#273) [Compare Source](https://redirect.github.com/sveltejs/kit/compare/@sveltejs/kit@2.7.2...@sveltejs/kit@2.7.3) ##### Patch Changes - fix: include importer in illegal import error message ([#​12820](https://redirect.github.com/sveltejs/kit/pull/12820)) - fix: don't try reading assets directly that aren't present ([#​12876](https://redirect.github.com/sveltejs/kit/pull/12876)) - fix: decode non-latin characters when previewing prerendered pages ([#​12874](https://redirect.github.com/sveltejs/kit/pull/12874)) - fix: better error message when a `Result` is returned from a form action ([#​12829](https://redirect.github.com/sveltejs/kit/pull/12829)) - docs: update URLs for new svelte.dev site ([#​12857](https://redirect.github.com/sveltejs/kit/pull/12857))

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