Bump next from 15.2.4 to 15.4.8

Bumps [next](https://github.com/vercel/next.js) from 15.2.4 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@v15.2.4...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]

package.json

@@ -36,7 +36,7 @@
     "drizzle-orm": "^0.39.2",
     "gray-matter": "^4.0.3",
     "lodash": "^4.17.21",
-    "next": "15.2.4",
+    "next": "15.4.8",
     "next-sitemap": "^4.2.3",
     "node-fetch": "2.7.0",
     "nodemailer": "^6.10.0",