chore(deps): Bump next from 13.0.7 to 14.2.21 in /apps/site

Bumps [next](https://github.com/vercel/next.js) from 13.0.7 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@v13.0.7...v14.2.21)

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

Signed-off-by: dependabot[bot] <[email protected]>

apps/site/package.json

@@ -13,7 +13,7 @@
     "@faststore/api": "^3.5.0",
     "@faststore/sdk": "^3.5.0",
     "@faststore/ui": "^3.5.0",
-    "next": "13.0.7",
+    "next": "14.2.21",
     "nextra": "^2.8.0",
     "nextra-theme-docs": "^2.8.0",
     "react": "^18.2.0",