🤖 Bump svelte-check from 3.7.1 to 3.8.4 in /frontend

Bumps [svelte-check](https://github.com/sveltejs/language-tools) from 3.7.1 to 3.8.4.
- [Release notes](https://github.com/sveltejs/language-tools/releases)
- [Commits](sveltejs/language-tools@svelte-check-3.7.1...svelte-check-3.8.4)

---
updated-dependencies:
- dependency-name: svelte-check
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

frontend/package.json

@@ -37,7 +37,7 @@
     "prettier": "^3.3.2",
     "prettier-plugin-svelte": "^3.2.5",
     "svelte": "^4.2.17",
-    "svelte-check": "^3.7.1",
+    "svelte-check": "^3.8.4",
     "svelte-dnd-action": "^0.9.42",
     "svelte-preprocess": "^5.1.4",
     "tailwind-scrollbar": "^3.1.0",