chore(deps): bump next in /references/realtime-streams

Bumps [next](https://github.com/vercel/next.js) from 15.5.6 to 15.5.7.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.5.6...v15.5.7)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.5.7
  dependency-type: direct:production
...

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

Author: dependabot[bot]

references/realtime-streams/package.json

@@ -14,7 +14,7 @@
     "@trigger.dev/react-hooks": "workspace:*",
     "@trigger.dev/sdk": "workspace:*",
     "ai": "^5.0.76",
-    "next": "15.5.6",
+    "next": "15.5.7",
     "react": "19.1.0",
     "react-dom": "19.1.0",
     "shiki": "^3.13.0",