chore(deps): update dependency @sveltejs/package to v2.3.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@sveltejs/package (source)	2.2.7 -> 2.3.1

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Release Notes

sveltejs/kit (@​sveltejs/package)

### [`v2.3.1`](https://togithub.com/sveltejs/kit/blob/HEAD/packages/package/CHANGELOG.md#231) [Compare Source](https://togithub.com/sveltejs/kit/compare/@sveltejs/package@2.3.0...@sveltejs/package@2.3.1) ##### Patch Changes - fix: don't strip `lang="ts"` tag in Svelte 5 ([#​12080](https://togithub.com/sveltejs/kit/pull/12080)) ### [`v2.3.0`](https://togithub.com/sveltejs/kit/blob/HEAD/packages/package/CHANGELOG.md#230) [Compare Source](https://togithub.com/sveltejs/kit/compare/@sveltejs/package@2.2.7...@sveltejs/package@2.3.0) ##### Minor Changes - feat: add option to specify the tsconfig/jsconfig ([#​11698](https://togithub.com/sveltejs/kit/pull/11698))

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