Bump postcss from 8.4.22 to 8.4.31

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.22 to 8.4.31.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.22...8.4.31)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: direct:development
...

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

package.json

@@ -29,7 +29,7 @@
         "eslint-webpack-plugin": "^4.0.1",
         "laravel-vite-plugin": "^0.7.4",
         "npm-run-all": "^4.1.5",
-        "postcss": "^8.4.22",
+        "postcss": "^8.4.31",
         "prettier": "2.7.1",
         "prettier-plugin-tailwindcss": "^0.2.7",
         "tailwindcss": "^3.3.1",