chore(deps): bump openai from 4.67.1 to 4.68.4

Bumps [openai](https://github.com/openai/openai-node) from 4.67.1 to 4.68.4.
- [Release notes](https://github.com/openai/openai-node/releases)
- [Changelog](https://github.com/openai/openai-node/blob/master/CHANGELOG.md)
- [Commits](openai/openai-node@v4.67.1...v4.68.4)

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

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