Bump @sveltejs/kit from 2.48.3 to 2.50.1 in /installer-gui

Bumps [@sveltejs/kit](https://github.com/sveltejs/kit/tree/HEAD/packages/kit) from 2.48.3 to 2.50.1.
- [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@2.50.1/packages/kit)

---
updated-dependencies:
- dependency-name: "@sveltejs/kit"
  dependency-version: 2.50.1
  dependency-type: direct:development
...

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

installer-gui/package.json

@@ -23,7 +23,7 @@
     "devDependencies": {
         "@eslint/js": "^9.38.0",
         "@sveltejs/adapter-static": "^3.0.6",
-        "@sveltejs/kit": "^2.9.0",
+        "@sveltejs/kit": "^2.50.1",
         "@sveltejs/vite-plugin-svelte": "^5.0.0",
         "@tauri-apps/cli": "^2",
         "eslint": "^9.38.0",