Bump next from 15.5.7 to 15.5.9

Bumps [next](https://github.com/vercel/next.js) from 15.5.7 to 15.5.9.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.5.7...v15.5.9)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.5.9
  dependency-type: direct:production
...

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

Author: dependabot[bot]

examples/address-from-zipcode/package.json

@@ -10,7 +10,7 @@
   },
   "dependencies": {
     "microcms-field-extension-react": "latest",
-    "next": "^15.3.6",
+    "next": "^15.5.9",
     "react": "^19.1.2",
     "react-dom": "^19.1.2"
   },