build(deps): bump next from 15.4.11 to 16.1.5 in /packages/storybook

Bumps [next](https://github.com/vercel/next.js) from 15.4.11 to 16.1.5.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.4.11...v16.1.5)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 16.1.5
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

packages/storybook/package.json

@@ -16,7 +16,7 @@
     "dompurify": "^2.5.4",
     "extension": "workspace:*",
     "jotai": "^2.12.2",
-    "next": "15.4.11",
+    "next": "16.1.5",
     "react": "18.3.1",
     "react-dom": "18.3.1",
     "webextension-polyfill": "^0.12.0"