chore(deps-dev): bump postcss from 8.4.29 to 8.4.31

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.29 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@8.4.29...8.4.31)

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

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

package.json

@@ -38,7 +38,7 @@
     "@typescript-eslint/parser": "6.7.4",
     "eslint": "8.51.0",
     "eslint-config-upleveled": "5.0.5",
-    "postcss": "8.4.29",
+    "postcss": "8.4.31",
     "rss": "1.2.2",
     "stylelint": "15.10.3",
     "stylelint-config-upleveled": "1.0.2",