build(deps-dev): bump svelte from 5.39.8 to 5.39.9 (#3694)

Bumps [svelte](https://github.com/sveltejs/svelte/tree/HEAD/packages/svelte) from 5.39.8 to 5.39.9.
- [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/[email protected]/packages/svelte)

---
updated-dependencies:
- dependency-name: svelte
  dependency-version: 5.39.9
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

packages/frontend/package.json

@@ -38,7 +38,7 @@
     "monaco-editor": "^0.52.2",
     "postcss": "^8.5.6",
     "postcss-load-config": "^6.0.1",
-    "svelte": "5.39.8",
+    "svelte": "5.39.9",
     "svelte-fa": "^4.0.4",
     "svelte-select": "^5.8.3",
     "svelte-markdown": "^0.4.1",