Bump the production-dependencies group across 1 directory with 2 updates

Bumps the production-dependencies group with 2 updates in the / directory: [@headlessui/react](https://github.com/tailwindlabs/headlessui/tree/HEAD/packages/@headlessui-react) and [date-fns](https://github.com/date-fns/date-fns).


Updates `@headlessui/react` from 2.1.3 to 2.1.8
- [Release notes](https://github.com/tailwindlabs/headlessui/releases)
- [Changelog](https://github.com/tailwindlabs/headlessui/blob/main/packages/@headlessui-react/CHANGELOG.md)
- [Commits](https://github.com/tailwindlabs/headlessui/commits/@headlessui/[email protected]/packages/@headlessui-react)

Updates `date-fns` from 3.6.0 to 4.0.0
- [Release notes](https://github.com/date-fns/date-fns/releases)
- [Changelog](https://github.com/date-fns/date-fns/blob/main/CHANGELOG.md)
- [Commits](date-fns/date-fns@v3.6.0...v4.0.0)

---
updated-dependencies:
- dependency-name: "@headlessui/react"
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: production-dependencies
- dependency-name: date-fns
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: production-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -5,14 +5,14 @@
   "type": "module",
   "dependencies": {
     "@dagrejs/dagre": "^1.1.4",
-    "@headlessui/react": "^2.1.3",
+    "@headlessui/react": "^2.1.8",
     "@headlessui/tailwindcss": "^0.2.1",
     "@heroicons/react": "^2.1.5",
     "@tailwindcss/typography": "^0.5.15",
     "@tanstack/react-query": "^5.53.3",
     "@tanstack/react-router": "^1.52.4",
     "clsx": "^2.1.1",
-    "date-fns": "^3.6.0",
+    "date-fns": "^4.0.0",
     "next-themes": "^0.3.0",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",