Bump next from 14.2.15 to 14.2.21

Bumps [next](/~https://github.com/vercel/next.js) from 14.2.15 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@v14.2.15...v14.2.21)

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

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

apps/nodepen-client/package.json

@@ -14,7 +14,7 @@
     "@tanstack/react-query": "^5.59.15",
     "graphql": "^16.9.0",
     "graphql-tag": "^2.12.6",
-    "next": "14.2.15",
+    "next": "14.2.21",
     "next-images": "^1.8.5",
     "react": "^18.3",
     "react-dom": "^18.0"