⬆️ bump tokenizers from 0.15.2 to 0.19.1

Bumps [tokenizers](https://github.com/huggingface/tokenizers) from 0.15.2 to 0.19.1.
- [Release notes](https://github.com/huggingface/tokenizers/releases)
- [Changelog](https://github.com/huggingface/tokenizers/blob/main/RELEASE.md)
- [Commits](huggingface/tokenizers@v0.15.2...v0.19.1)

---
updated-dependencies:
- dependency-name: tokenizers
  dependency-type: indirect
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]