chore(deps-dev): bump postcss from 8.4.19 to 8.4.31 in /apps/passport

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.19 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@8.4.19...8.4.31)

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

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

apps/passport/package.json

@@ -97,7 +97,7 @@
     "eslint-plugin-standard": "5.0.0",
     "eslint-plugin-storybook": "0.6.7",
     "npm-run-all": "4.1.5",
-    "postcss": "8.4.19",
+    "postcss": "8.4.31",
     "prettier": "2.7.1",
     "prop-types": "15.8.1",
     "sass": "1.54.7",