chore(deps-dev): bump postcss from 8.4.21 to 8.4.31

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.21 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@8.4.21...8.4.31)

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

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

package.json

@@ -62,7 +62,7 @@
     "@types/yargs": "^17.0.24",
     "autoprefixer": "^10.4.14",
     "dotenv": "^16.0.3",
-    "postcss": "^8.4.21",
+    "postcss": "^8.4.31",
     "prettier": "^2.8.7",
     "tailwindcss": "^3.2.7",
     "tsx": "^3.12.6"