Dependency(deps-dev): Bump tailwindcss from 4.1.18 to 4.2.1 (#48)

Bumps [tailwindcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/tailwindcss) from 4.1.18 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)

---
updated-dependencies:
- dependency-name: tailwindcss
  dependency-version: 4.2.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

package-lock.json

@@ -31,7 +31,7 @@
     "eslint": "^10.0.0",
     "eslint-config-next": "16.1.6",
     "postcss": "^8",
-    "tailwindcss": "^4.1.18",
+    "tailwindcss": "^4.2.1",
     "typescript": "^5"
   }
 }