build(deps-dev): bump postcss from 8.4.27 to 8.4.31

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.27 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@8.4.27...8.4.31)

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

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -62,7 +62,7 @@
     "eslint-plugin-storybook": "^0.6.15",
     "lightningcss": "^1.22.0",
     "msw": "^1.2.2",
-    "postcss": "^8.4.18",
+    "postcss": "^8.4.31",
     "postcss-nesting": "12.0.1",
     "prettier": "3.0.3",
     "standard-version": "^9.5.0",