chore(deps): bump next from 15.3.3 to 15.4.7 in /js

Bumps [next](https://github.com/vercel/next.js) from 15.3.3 to 15.4.7.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.3.3...v15.4.7)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.4.7
  dependency-type: direct:production
...

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

Author: dependabot[bot]

js/plugins/next/package.json

@@ -45,7 +45,7 @@
     "@types/react-dom": "^19",
     "genkit": "workspace:*",
     "jest": "^29.7.0",
-    "next": "^15.2.4",
+    "next": "^15.4.7",
     "npm-run-all": "^4.1.5",
     "rimraf": "^6.0.1",
     "ts-jest": "^29.1.2",