chore(deps-dev): bump @sveltejs/kit from 1.15.2 to 1.15.9

Bumps [@sveltejs/kit](https://github.com/sveltejs/kit/tree/HEAD/packages/kit) from 1.15.2 to 1.15.9.
- [Release notes](https://github.com/sveltejs/kit/releases)
- [Changelog](https://github.com/sveltejs/kit/blob/master/packages/kit/CHANGELOG.md)
- [Commits](https://github.com/sveltejs/kit/commits/@sveltejs/kit@1.15.9/packages/kit)

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

Signed-off-by: dependabot[bot] <support@github.com>