build(deps): bump next from 15.3.0 to 15.3.4 in /storefront

Bumps [next](https://github.com/vercel/next.js) from 15.3.0 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](vercel/next.js@v15.3.0...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>

Author: dependabot[bot]

storefront/package-lock.json

@@ -10,7 +10,7 @@
   },
   "dependencies": {
     "@fortawesome/fontawesome-free": "^6.7.2",
-    "next": "15.3.0",
+    "next": "15.3.4",
     "next-auth": "^4.24.11",
     "react": "^19.0.0",
     "react-bootstrap": "^2.10.9",