Bump the npm_and_yarn group across 1 directory with 2 updates

Bumps the npm_and_yarn group with 2 updates in the /docs directory: [postcss](https://github.com/postcss/postcss) and [next](https://github.com/vercel/next.js).


Updates `postcss` from 8.5.14 to 8.5.23
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.14...8.5.23)

Updates `next` from 16.2.4 to 16.2.11
- [Release notes](https://github.com/vercel/next.js/releases)
- [Commits](vercel/next.js@v16.2.4...v16.2.11)

---
updated-dependencies:
- dependency-name: postcss
  dependency-version: 8.5.23
  dependency-type: direct:production
  dependency-group: npm_and_yarn
- dependency-name: next
  dependency-version: 16.2.11
  dependency-type: direct:production
  dependency-group: npm_and_yarn
...

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

Author: dependabot[bot]

docs/package.json

@@ -23,8 +23,8 @@
     "fumadocs-ui": "^16.8.7",
     "lucide-react": "^0.515.0",
     "motion": "^12.38.0",
-    "next": "^16.2.4",
-    "postcss": "^8.5.14",
+    "next": "^16.2.11",
+    "postcss": "^8.5.23",
     "react": "^19.2.5",
     "react-dom": "^19.2.5",
     "tailwindcss": "^4.2.4",