chore(deps): bump openai from 5.11.0 to 6.7.0

Bumps [openai](https://github.com/openai/openai-node) from 5.11.0 to 6.7.0.
- [Release notes](https://github.com/openai/openai-node/releases)
- [Changelog](https://github.com/openai/openai-node/blob/master/CHANGELOG.md)
- [Commits](https://github.com/openai/openai-node/compare/v5.11.0...v6.7.0)

---
updated-dependencies:
- dependency-name: openai
  dependency-version: 6.7.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

package.json

@@ -27,7 +27,7 @@
     "@modelcontextprotocol/sdk": "^1.25.2",
     "@types/tmp": "^0.2.6",
     "js-yaml": "^4.1.1",
-    "openai": "^5.11.0",
+    "openai": "^6.28.0",
     "pkce-challenge": "^5.0.0",
     "tmp": "^0.2.4"
   },