Bump next from 15.4.0 to 15.4.7 in /examples/monaco-graphql-nextjs

Bumps [next](https://github.com/vercel/next.js) from 15.4.0 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@v15.4.0...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]

examples/monaco-graphql-nextjs/package.json

@@ -15,7 +15,7 @@
     "jsonc-parser": "^3.2.0",
     "monaco-editor": "^0.52.2",
     "monaco-graphql": "^1.7.2",
-    "next": "15.4.0",
+    "next": "15.4.7",
     "react": "^19.1.0",
     "react-dom": "^19.1.0"
   },