Bump next from 15.3.1 to 15.3.4

Bumps [next](https://github.com/vercel/next.js) from 15.3.1 to 15.3.4.
- [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/v15.3.1...v15.3.4)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.3.4
  dependency-type: direct:production
...

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

package.json

@@ -25,7 +25,7 @@
         "dangerously-set-html-content": "^1.0.13",
         "date-fns": "^2.29.0",
         "markdown-it": "^13.0.1",
-        "next": "^15.3.0",
+        "next": "^15.3.4",
         "next-seo": "^5.15.0",
         "react": "^18.3.0",
         "react-dom": "^18.3.0",