Build(deps-dev): Bump postcss from 8.4.30 to 8.4.31 (#39278)

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.30 to 8.4.31.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss/compare/8.4.30...8.4.31)

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

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package.json

@@ -140,7 +140,7 @@
     "lockfile-lint": "^4.12.1",
     "nodemon": "^3.0.1",
     "npm-run-all2": "^6.0.6",
-    "postcss": "^8.4.30",
+    "postcss": "^8.4.31",
     "postcss-cli": "^10.1.0",
     "rollup": "^3.29.3",
     "rollup-plugin-istanbul": "^4.0.0",