chore(deps): bump postcss in /examples/nextjs-response-streaming

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.31 to 8.5.10.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.31...8.5.10)

---
updated-dependencies:
- dependency-name: postcss
  dependency-version: 8.5.10
  dependency-type: direct:production
...

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

Author: dependabot[bot]

examples/nextjs-response-streaming/package-lock.json

@@ -23,7 +23,7 @@
     "eslint-config-next": "14.2.2",
     "ms": "3.0.0-canary.1",
     "next": "14.2.10",
-    "postcss": "8.4.31",
+    "postcss": "8.5.10",
     "react": "18.2.0",
     "react-dom": "18.2.0",
     "sharp": "^0.32.6",
@@ -41,7 +41,7 @@
     "eslint": "8.30.0",
     "eslint-config-next": "13.1.0",
     "lint-staged": "13.1.0",
-    "postcss": "8.4.31",
+    "postcss": "8.5.10",
     "prettier": "2.8.1",
     "prettier-plugin-tailwindcss": "0.2.1",
     "tailwindcss": "3.3.1",