build(deps-dev): bump postcss from 8.4.19 to 8.4.31

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.19 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@8.4.19...8.4.31)

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

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

package.json

@@ -91,7 +91,7 @@
     "eslint-plugin-react-hooks": "^4.6.0",
     "jest": "^29.6.1",
     "node-fetch": "^3.3.2",
-    "postcss": "^8.4.6",
+    "postcss": "^8.4.31",
     "prettier": "^2.3.2",
     "prettier-plugin-tailwindcss": "^0.2.2",
     "prisma": "^5.0.0",