Bump @tailwindcss/postcss from 4.1.17 to 4.1.18

Bumps [@tailwindcss/postcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/@tailwindcss-postcss) from 4.1.17 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)

---
updated-dependencies:
- dependency-name: "@tailwindcss/postcss"
  dependency-version: 4.1.18
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

package.json

@@ -77,7 +77,7 @@
     },
     "devDependencies": {
         "@eslint/js": "^9.21.0",
-        "@tailwindcss/postcss": "^4.1.8",
+        "@tailwindcss/postcss": "^4.1.18",
         "@types/react": "^19.0.10",
         "@types/react-dom": "^19.0.4",
         "@vitejs/plugin-react-swc": "^4.2.2",