chore(deps-dev): bump postcss from 8.4.28 to 8.4.31

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.28 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@8.4.28...8.4.31)

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

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

package.json

@@ -106,7 +106,7 @@
 		"jest": "^29.6.4",
 		"jest-environment-jsdom": "^29.6.4",
 		"jest-runner-eslint": "^2.1.0",
-		"postcss": "^8.4.28",
+		"postcss": "^8.4.31",
 		"prettier": "^3.0.2",
 		"prettier-plugin-tailwindcss": "^0.5.3",
 		"storybook": "^7.3.2",