chore(deps): bump next in /packages/openfeature-browser-provider/example

Bumps [next](https://github.com/vercel/next.js) from 14.2.26 to 15.5.14.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v14.2.26...v15.5.14)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.5.14
  dependency-type: direct:production
...

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

Author: dependabot[bot]

packages/openfeature-browser-provider/example/package.json

@@ -18,7 +18,7 @@
     "@openfeature/react-sdk": "^0.4.5",
     "@openfeature/web-sdk": "^1.2.3",
     "@reflag/react-sdk": "workspace:^",
-    "next": "14.2.26",
+    "next": "15.5.15",
     "react": "^18",
     "react-dom": "^18"
   },