build(deps-dev): bump @sveltejs/vite-plugin-svelte in /www

Bumps [@sveltejs/vite-plugin-svelte](https://github.com/sveltejs/vite-plugin-svelte/tree/HEAD/packages/vite-plugin-svelte) from 3.1.2 to 4.0.0.
- [Release notes](https://github.com/sveltejs/vite-plugin-svelte/releases)
- [Changelog](https://github.com/sveltejs/vite-plugin-svelte/blob/main/packages/vite-plugin-svelte/CHANGELOG.md)
- [Commits](https://github.com/sveltejs/vite-plugin-svelte/commits/@sveltejs/vite-plugin-svelte@4.0.0/packages/vite-plugin-svelte)

---
updated-dependencies:
- dependency-name: "@sveltejs/vite-plugin-svelte"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

www/package-lock.json

@@ -21,7 +21,7 @@
         "@eslint/js": "^9.14.0",
         "@sveltejs/adapter-auto": "^3.3.1",
         "@sveltejs/kit": "^2.7.4",
-        "@sveltejs/vite-plugin-svelte": "^3.1.2",
+        "@sveltejs/vite-plugin-svelte": "^4.0.0",
         "@types/eslint": "~9.6.1",
         "@types/eslint__js": "~8.42.3",
         "autoprefixer": "^10.4.20",