Update tokenizers requirement from 0.22.1 to 0.23.1

Updates the requirements on [tokenizers](https://github.com/huggingface/tokenizers) to permit the latest version.
- [Release notes](https://github.com/huggingface/tokenizers/releases)
- [Changelog](https://github.com/huggingface/tokenizers/blob/main/RELEASE.md)
- [Commits](huggingface/tokenizers@v0.22.1...v0.23.1)

---
updated-dependencies:
- dependency-name: tokenizers
  dependency-version: 0.23.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Cargo.toml

@@ -52,7 +52,7 @@ cudarc = { version = "0.19", optional = true, default-features = false, features
   "dynamic-linking"
 ] }
 ureq = { version = "3.1.4", default-features = false, features = ["rustls", "gzip"] }
-tokenizers = { version = "0.22.1", optional = true }
+tokenizers = { version = "0.23.1", optional = true }
 lru = { version = "0.16.2", default-features = false }