Bump next in /live-assignments/box-office/exercise

Bumps [next](https://github.com/vercel/next.js) from 14.2.10 to 14.2.30.
- [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...v14.2.30)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 14.2.30
  dependency-type: direct:production
...

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

Author: dependabot[bot]

live-assignments/box-office/exercise/client/package.json

@@ -11,7 +11,7 @@
   "dependencies": {
     "react": "^18",
     "react-dom": "^18",
-    "next": "14.2.21"
+    "next": "14.2.30"
   },
   "devDependencies": {
     "eslint": "^8",