chore(deps): bump next from 14.2.35 to 16.1.5 in /playground

Bumps [next](https://github.com/vercel/next.js) from 14.2.35 to 16.1.5.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v14.2.35...v16.1.5)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 16.1.5
  dependency-type: direct:production
...

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

Author: dependabot[bot]

playground/package.json

@@ -10,7 +10,7 @@
     "@codemirror/lang-yaml": "^6.0.0",
     "@uiw/codemirror-theme-material": "^4.21.24",
     "@uiw/react-codemirror": "^4.21.24",
-    "next": "14.2.35",
+    "next": "16.1.5",
     "react": "^18",
     "react-dom": "^18",
     "react-split": "^2.0.14",