chore(deps-dev): bump postcss from 8.4.14 to 8.4.31

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.14 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@8.4.14...8.4.31)

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

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

docs/package.json

@@ -22,7 +22,7 @@
     "framer-motion": "^10.16.4",
     "mdx-mermaid": "1.2.2",
     "mermaid": "9.0.1",
-    "postcss": "^8.4.29",
+    "postcss": "^8.4.31",
     "prism-react-renderer": "1.3.5",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",

packages/core/package.json

@@ -90,7 +90,7 @@
     "@types/nodemailer": "6.4.6",
     "@types/react": "18.0.37",
     "autoprefixer": "10.4.13",
-    "postcss": "8.4.19",
+    "postcss": "8.4.31",
     "postcss-nested": "6.0.0"
   }
 }