chore(deps): bump next from 15.1.2 to 15.4.8

Bumps [next](https://github.com/vercel/next.js) from 15.1.2 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](https://github.com/vercel/next.js/compare/v15.1.2...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>

package.json

@@ -25,7 +25,7 @@
     "clsx": "^2.1.0",
     "lucia": "^3.2.2",
     "lucide-react": "^0.368.0",
-    "next": "^15.1.2",
+    "next": "^15.4.8",
     "next-themes": "^0.4.4",
     "react": "19",
     "react-dom": "19",