chore(deps-dev): bump @tailwindcss/postcss from 4.2.0 to 4.2.1

Bumps [@tailwindcss/postcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/@tailwindcss-postcss) from 4.2.0 to 4.2.1.
- [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/v4.2.1/packages/@tailwindcss-postcss)

---
updated-dependencies:
- dependency-name: "@tailwindcss/postcss"
  dependency-version: 4.2.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package.json

@@ -18,7 +18,7 @@
     },
     "devDependencies": {
         "@biomejs/biome": "2.4.0",
-        "@tailwindcss/postcss": "^4.2.0",
+        "@tailwindcss/postcss": "^4.2.1",
         "@types/node": "25.2.2",
         "@types/react": "19.2.14",
         "biome-config-pixel": "2.1.7",