⬆️ Bump js-tiktoken in the patch-production group

Bumps the patch-production group with 1 update: [js-tiktoken](https://github.com/dqbd/tiktoken).


Updates `js-tiktoken` from 1.0.18 to 1.0.19
- [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/[email protected]@1.0.19)

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

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

Author: dependabot[bot]