Bump postcss from 8.4.23 to 8.4.31

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>

package.json

@@ -56,7 +56,7 @@
     "eslint-plugin-tailwindcss": "^3.8.3",
     "jest": "^29.5.0",
     "jest-environment-jsdom": "^29.5.0",
-    "postcss": "8.4.23",
+    "postcss": "8.4.31",
     "prettier": "^2.8.8",
     "tailwindcss": "3.3.2",
     "ts-jest": "^29.1.0",