Bump postcss from 8.4.28 to 8.4.31 in /test/frameworks/remix-blues (#86)

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.28 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@8.4.28...8.4.31)

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

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test/frameworks/remix-blues/package.json

@@ -79,7 +79,7 @@
     "happy-dom": "^10.10.4",
     "msw": "^1.2.3",
     "npm-run-all": "^4.1.5",
-    "postcss": "^8.4.28",
+    "postcss": "^8.4.31",
     "prettier": "3.0.2",
     "prettier-plugin-tailwindcss": "^0.5.3",
     "prisma": "^4.16.2",