chore(deps): bump next from 15.1.0 to 15.4.8 in /apps/preview

Bumps [next](https://github.com/vercel/next.js) from 15.1.0 to 15.4.8.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.1.0...v15.4.8)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.4.8
  dependency-type: direct:production
...

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

Author: dependabot[bot]

apps/preview/package.json

@@ -19,7 +19,7 @@
 		"@types/mdx": "^2.0.13",
 		"clsx": "^2.1.1",
 		"gray-matter": "^4.0.3",
-		"next": "15.1.0",
+		"next": "15.4.10",
 		"next-mdx-remote": "^5.0.0",
 		"next-themes": "^0.4.4",
 		"react": "^19",