build(deps): Bump the npm-production group across 1 directory with 4 updates

Bumps the npm-production group with 3 updates in the / directory: [@headlessui/react](https://github.com/tailwindlabs/headlessui/tree/HEAD/packages/@headlessui-react), [@tailwindcss/postcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/@tailwindcss-postcss) and [@tailwindcss/vite](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/@tailwindcss-vite).


Updates `@headlessui/react` from 2.2.6 to 2.2.9
- [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/react@v2.2.9/packages/@headlessui-react)

Updates `@tailwindcss/postcss` from 4.1.11 to 4.1.18
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/tailwindlabs/tailwindcss/commits/v4.1.18/packages/@tailwindcss-postcss)

Updates `@tailwindcss/vite` from 4.1.11 to 4.1.18
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/tailwindlabs/tailwindcss/commits/v4.1.18/packages/@tailwindcss-vite)

Updates `tailwindcss` from 4.1.11 to 4.1.18
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/tailwindlabs/tailwindcss/commits/v4.1.18/packages/tailwindcss)

---
updated-dependencies:
- dependency-name: "@headlessui/react"
  dependency-version: 2.2.9
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: npm-production
- dependency-name: "@tailwindcss/postcss"
  dependency-version: 4.1.18
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: npm-production
- dependency-name: "@tailwindcss/vite"
  dependency-version: 4.1.18
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: npm-production
- dependency-name: tailwindcss
  dependency-version: 4.1.18
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: npm-production
...

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Author: dependabot[bot]