⬆️ Bump the openai group across 1 directory with 2 updates

Bumps the openai group with 2 updates in the / directory: [js-tiktoken](https://github.com/dqbd/tiktoken) and [openai](https://github.com/openai/openai-node).


Updates `js-tiktoken` from 1.0.16 to 1.0.18
- [Release notes](https://github.com/dqbd/tiktoken/releases)
- [Changelog](https://github.com/dqbd/tiktoken/blob/main/CHANGELOG.md)
- [Commits](https://github.com/dqbd/tiktoken/compare/js-tiktoken@1.0.16...js-tiktoken@1.0.18)

Updates `openai` from 4.77.4 to 4.83.0
- [Release notes](https://github.com/openai/openai-node/releases)
- [Changelog](https://github.com/openai/openai-node/blob/master/CHANGELOG.md)
- [Commits](openai/openai-node@v4.77.4...v4.83.0)

---
updated-dependencies:
- dependency-name: js-tiktoken
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: openai
- dependency-name: openai
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: openai
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]