Chore(deps): Bump next from 15.2.3 to 15.4.2

Bumps [next](https://github.com/vercel/next.js) from 15.2.3 to 15.4.2.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.2.3...v15.4.2)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.4.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

apps/contact/package.json

@@ -11,7 +11,7 @@
   "dependencies": {
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
-    "next": "15.2.3",
+    "next": "15.4.2",
     "@notionhq/client": "^2.2.15",
     "@upstash/ratelimit": "^2.0.5",
     "@upstash/redis": "^1.34.3",