Bump svelte from 4.2.16 to 5.55.7 in /site

Bumps [svelte](https://github.com/sveltejs/svelte/tree/HEAD/packages/svelte) from 4.2.16 to 5.55.7.
- [Release notes](https://github.com/sveltejs/svelte/releases)
- [Changelog](https://github.com/sveltejs/svelte/blob/main/packages/svelte/CHANGELOG.md)
- [Commits](https://github.com/sveltejs/svelte/commits/svelte@5.55.7/packages/svelte)

---
updated-dependencies:
- dependency-name: svelte
  dependency-version: 5.55.7
  dependency-type: direct:production
...

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

Author: dependabot[bot]

site/package.json

@@ -58,7 +58,7 @@
     "requestidlecallback": "^0.3.0",
     "shiki": "^1.10.0",
     "slugify": "^1.6.6",
-    "svelte": "^4.2.16",
+    "svelte": "^5.55.7",
     "uslug": "^1.0.4",
     "workbox-cacheable-response": "^7.1.0",
     "workbox-core": "^7.1.0",