chore(deps): bump undici and @sveltejs/kit

Bumps [undici](https://github.com/nodejs/undici) to 5.28.4 and updates ancestor dependency [@sveltejs/kit](https://github.com/sveltejs/kit/tree/HEAD/packages/kit). These dependencies need to be updated together.


Updates `undici` from 5.26.3 to 5.28.4
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v5.26.3...v5.28.4)

Updates `@sveltejs/kit` from 1.26.0 to 1.30.4
- [Release notes](https://github.com/sveltejs/kit/releases)
- [Changelog](https://github.com/sveltejs/kit/blob/@sveltejs/[email protected]/packages/kit/CHANGELOG.md)
- [Commits](https://github.com/sveltejs/kit/commits/@sveltejs/[email protected]/packages/kit)

---
updated-dependencies:
- dependency-name: undici
  dependency-type: indirect
- dependency-name: "@sveltejs/kit"
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -13,7 +13,7 @@
   },
   "devDependencies": {
     "@sveltejs/adapter-vercel": "^3.0.3",
-    "@sveltejs/kit": "^1.26.0",
+    "@sveltejs/kit": "^1.30.4",
     "@types/glob": "^8.1.0",
     "@types/marked": "^6.0.0",
     "@typescript-eslint/eslint-plugin": "^6.8.0",