chore(deps): bump openai from 6.14.0 to 6.15.0 in the agent group

Bumps the agent group with 1 update: [openai](https://github.com/openai/openai-node).


Updates `openai` from 6.14.0 to 6.15.0
- [Release notes](https://github.com/openai/openai-node/releases)
- [Changelog](https://github.com/openai/openai-node/blob/master/CHANGELOG.md)
- [Commits](openai/openai-node@v6.14.0...v6.15.0)

---
updated-dependencies:
- dependency-name: openai
  dependency-version: 6.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: agent
...

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

Author: dependabot[bot]

package-lock.json

@@ -17,7 +17,7 @@
     "@agentica/core": "^0.34.2",
     "@wrtnlabs/connector-github": "^0.1.506",
     "dotenv": "^16.4.7",
-    "openai": "^6.14.0",
+    "openai": "^6.15.0",
     "typia": "^10.1.0"
   }
 }