build(deps-dev): bump postcss from 8.4.23 to 8.4.31 (#1451)

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.23 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@8.4.23...8.4.31)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -124,7 +124,7 @@
         "path": "^0.12.7",
         "po-loader": "^0.7.0",
         "po2json": "^1.0.0-alpha",
-        "postcss": "^8.4.23",
+        "postcss": "^8.4.36",
         "postcss-import": "^15.1.0",
         "postcss-inline-svg": "^6.0.0",
         "postcss-loader": "^7.3.0",