chore(deps): update dependency svelte to v5.20.0 (#1231)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [svelte](https://svelte.dev)
([source](https://redirect.github.com/sveltejs/svelte/tree/HEAD/packages/svelte))
| [`5.19.10` ->
`5.20.0`](https://renovatebot.com/diffs/npm/svelte/5.19.10/5.20.0) |
[![age](https://developer.mend.io/api/mc/badges/age/npm/svelte/5.20.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/svelte/5.20.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/svelte/5.19.10/5.20.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/svelte/5.19.10/5.20.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>sveltejs/svelte (svelte)</summary>

###
[`v5.20.0`](https://redirect.github.com/sveltejs/svelte/blob/HEAD/packages/svelte/CHANGELOG.md#5200)

[Compare
Source](https://redirect.github.com/sveltejs/svelte/compare/[email protected]@5.20.0)

##### Minor Changes

- feat: SSR-safe ID generation with `$props.id()`
([#&#8203;15185](https://redirect.github.com/sveltejs/svelte/pull/15185))

##### Patch Changes

- fix: take private and public into account for `constant_assignment` of
derived state
([#&#8203;15276](https://redirect.github.com/sveltejs/svelte/pull/15276))

- fix: value/checked not correctly set using spread
([#&#8203;15239](https://redirect.github.com/sveltejs/svelte/pull/15239))

- chore: tweak effect self invalidation logic, run transition dispatches
without reactive context
([#&#8203;15275](https://redirect.github.com/sveltejs/svelte/pull/15275))

- fix: use `importNode` to clone templates for Firefox
([#&#8203;15272](https://redirect.github.com/sveltejs/svelte/pull/15272))

- fix: recurse into `$derived` for ownership validation
([#&#8203;15166](https://redirect.github.com/sveltejs/svelte/pull/15166))

</details>

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