Bump postcss from 8.4.24 to 8.4.31

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.24 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@8.4.24...8.4.31)

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

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

Author: dependabot[bot]

package-lock.json

@@ -28,7 +28,7 @@
     "next": "13.4.12",
     "next-pwa": "^5.6.0",
     "papaparse": "^5.4.1",
-    "postcss": "8.4.24",
+    "postcss": "8.4.31",
     "react": "18.2.0",
     "react-awesome-animated-number": "^1.0.11",
     "react-dom": "18.2.0",