npm-dep: bump svelte-check from 3.6.5 to 3.6.6 in /frontend

Bumps [svelte-check](https://github.com/sveltejs/language-tools) from 3.6.5 to 3.6.6.
- [Release notes](https://github.com/sveltejs/language-tools/releases)
- [Commits](sveltejs/language-tools@svelte-check-3.6.5...svelte-check-3.6.6)

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

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

frontend/package.json

@@ -29,7 +29,7 @@
 		"prettier": "^3.2.5",
 		"prettier-plugin-svelte": "^3.2.2",
 		"svelte": "^4.2.12",
-		"svelte-check": "^3.6.5",
+		"svelte-check": "^3.6.6",
 		"tailwindcss": "^3.4.1",
 		"tslib": "^2.6.2",
 		"typescript": "^5.3.3",