Bump next from 14.2.10 to 14.2.21 in /llm-translator-app

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] <[email protected]>

Author: dependabot[bot]

llm-translator-app/package-lock.json

@@ -14,7 +14,7 @@
   "dependencies": {
     "@carbon/react": "^1.48.1",
     "concurrently": "^8.2.2",
-    "next": "^14.2.10",
+    "next": "^14.2.21",
     "react": "18.2.0"
   },
   "devDependencies": {