Update dependency @sveltejs/kit to v2.6.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@sveltejs/kit (source)	2.6.0 -> 2.6.1

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Release Notes

sveltejs/kit (@​sveltejs/kit)

### [`v2.6.1`](https://redirect.github.com/sveltejs/kit/blob/HEAD/packages/kit/CHANGELOG.md#261) [Compare Source](https://redirect.github.com/sveltejs/kit/compare/@sveltejs/kit@2.6.0...@sveltejs/kit@2.6.1) ##### Patch Changes - fix: better error message when calling push/replaceState before router is initialized ([#​11968](https://redirect.github.com/sveltejs/kit/pull/11968))

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