[npm] Bump @tailwindcss/postcss from 4.1.5 to 4.1.6

Bumps [@tailwindcss/postcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/@tailwindcss-postcss) from 4.1.5 to 4.1.6.
- [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/v4.1.6/packages/@tailwindcss-postcss)

---
updated-dependencies:
- dependency-name: "@tailwindcss/postcss"
  dependency-version: 4.1.6
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package.json

@@ -31,7 +31,7 @@
     "@farmfe/core": "^1.7.4",
     "@farmfe/js-plugin-postcss": "^1.12.0",
     "@farmfe/plugin-react": "^1.2.6",
-    "@tailwindcss/postcss": "^4.1.5",
+    "@tailwindcss/postcss": "^4.1.6",
     "@testing-library/react": "^16.3.0",
     "@types/lodash": "^4.17.16",
     "@types/node": "^22.15.12",