Bump postcss from 8.4.23 to 8.4.31 in /apps/fifty-fifty-php

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.23 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@8.4.23...8.4.31)

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

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

Author: dependabot[bot]

apps/fifty-fifty-php/package-lock.json

@@ -10,7 +10,7 @@
         "autoprefixer": "^10.4.2",
         "axios": "^1.1.2",
         "laravel-vite-plugin": "^0.7.2",
-        "postcss": "^8.4.6",
+        "postcss": "^8.4.31",
         "tailwindcss": "^3.1.0",
         "vite": "^4.3.9"
     }