chore(deps): bump openai from 2.5.0 to 2.6.0

Bumps [openai](https://github.com/openai/openai-python) from 2.5.0 to 2.6.0.
- [Release notes](https://github.com/openai/openai-python/releases)
- [Changelog](https://github.com/openai/openai-python/blob/main/CHANGELOG.md)
- [Commits](openai/openai-python@v2.5.0...v2.6.0)

---
updated-dependencies:
- dependency-name: openai
  dependency-version: 2.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]