build(deps-dev): bump svelte-check from 4.1.7 to 4.2.1

Bumps [svelte-check](https://github.com/sveltejs/language-tools) from 4.1.7 to 4.2.1.
- [Release notes](https://github.com/sveltejs/language-tools/releases)
- [Commits](sveltejs/language-tools@svelte-check-4.1.7...svelte-check-4.2.1)

---
updated-dependencies:
- dependency-name: svelte-check
  dependency-version: 4.2.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package-lock.json

@@ -29,7 +29,7 @@
     "prettier": "^3.5.3",
     "prettier-plugin-tailwindcss": "^0.6.12",
     "svelte": "^5.33.16",
-    "svelte-check": "^4.1.7",
+    "svelte-check": "^4.2.1",
     "tailwindcss": "^3.4.17",
     "typescript": "^5.8.3",
     "vite": "^6.3.5",