Bump @sveltejs/kit from 2.17.3 to 2.20.7 in /svelte (#2418)

Bumps [@sveltejs/kit](https://github.com/sveltejs/kit/tree/HEAD/packages/kit) from 2.17.3 to 2.20.7.
- [Release notes](https://github.com/sveltejs/kit/releases)
- [Changelog](https://github.com/sveltejs/kit/blob/main/packages/kit/CHANGELOG.md)
- [Commits](https://github.com/sveltejs/kit/commits/@sveltejs/kit@2.20.7/packages/kit)

---
updated-dependencies:
- dependency-name: "@sveltejs/kit"
  dependency-version: 2.20.7
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

svelte/package-lock.json

@@ -54,7 +54,7 @@
   },
   "devDependencies": {
     "@sveltejs/adapter-auto": "4.0.0",
-    "@sveltejs/kit": "2.17.3",
+    "@sveltejs/kit": "2.20.7",
     "@sveltejs/package": "2.3.10",
     "@sveltejs/vite-plugin-svelte": "5.0.3",
     "@typescript-eslint/eslint-plugin": "8.26.1",