Bump @sveltejs/kit from 2.8.1 to 2.15.1 in /src/ui

Bumps [@sveltejs/kit](https://github.com/sveltejs/kit/tree/HEAD/packages/kit) from 2.8.1 to 2.15.1.
- [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@2.15.1/packages/kit)

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

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

src/ui/package.json

@@ -17,7 +17,7 @@
 		"@skeletonlabs/skeleton": "^2.10.3",
 		"@skeletonlabs/tw-plugin": "^0.4.0",
 		"@sveltejs/adapter-static": "^3.0.6",
-		"@sveltejs/kit": "^2.8.1",
+		"@sveltejs/kit": "^2.15.1",
 		"@sveltejs/vite-plugin-svelte": "^3.1.2",
 		"@tailwindcss/forms": "^0.5.9",
 		"@types/cookie": "^1.0.0",