chore(deps): Bump next from 14.2.10 to 14.2.21 in /apps/react-next

Bumps [next](https://github.com/vercel/next.js) from 14.2.10 to 14.2.21.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v14.2.10...v14.2.21)

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

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

Author: dependabot[bot]

apps/react-next/package-lock.json

@@ -13,7 +13,7 @@
     "react": "^18",
     "react-dom": "^18",
     "react-sizeme": "^3.0.0",
-    "next": "^14.2.10"
+    "next": "^14.2.21"
   },
   "devDependencies": {
     "typescript": "^5",