build(deps): bump tokenizers from 0.21 to 0.22.1

Bumps [tokenizers](https://github.com/huggingface/tokenizers) from 0.21 to 0.22.1.
- [Release notes](https://github.com/huggingface/tokenizers/releases)
- [Changelog](https://github.com/huggingface/tokenizers/blob/main/RELEASE.md)
- [Commits](huggingface/tokenizers@v0.21.0...v0.22.1)

---
updated-dependencies:
- dependency-name: tokenizers
  dependency-version: 0.22.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

docs/requirements-docs.txt

@@ -10,4 +10,4 @@ sphinx-markdown-tables
 sphinx-rtd-theme
 
 # pin tokenizers version to avoid env_logger version req
-tokenizers==0.21
+tokenizers==0.22.1