chore(deps-dev): Bump @tailwindcss/postcss from 4.0.3 to 4.0.6

Bumps [@tailwindcss/postcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/@tailwindcss-postcss) from 4.0.3 to 4.0.6.
- [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/v4.0.6/packages/@tailwindcss-postcss)

---
updated-dependencies:
- dependency-name: "@tailwindcss/postcss"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

package.json

@@ -32,7 +32,7 @@
     "@eslint/eslintrc": "^3.2.0",
     "@iconify/react": "^5.2.0",
     "@next/bundle-analyzer": "^15.1.6",
-    "@tailwindcss/postcss": "^4.0.3",
+    "@tailwindcss/postcss": "^4.0.6",
     "@testing-library/react": "^16.2.0",
     "@trivago/prettier-plugin-sort-imports": "^5.2.2",
     "@types/negotiator": "^0.6.3",