Bump @sveltejs/kit from 2.11.1 to 2.21.1

Bumps [@sveltejs/kit](https://github.com/sveltejs/kit/tree/HEAD/packages/kit) from 2.11.1 to 2.21.1.
- [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@2.21.1/packages/kit)

---
updated-dependencies:
- dependency-name: "@sveltejs/kit"
  dependency-version: 2.21.1
  dependency-type: direct:development
...

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

Author: dependabot[bot]

package-lock.json

@@ -16,7 +16,7 @@
   },
   "devDependencies": {
     "@sveltejs/adapter-auto": "^6.0.0",
-    "@sveltejs/kit": "^2.8.1",
+    "@sveltejs/kit": "^2.21.1",
     "@sveltejs/vite-plugin-svelte": "^5.0.3",
     "@tailwindcss/postcss": "^4.0.9",
     "@tailwindcss/typography": "^0.5.13",