chore(deps): update tokenizers requirement from 0.15.0 to 0.19.0

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@v0.15.0...v0.15.2)

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

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

enfer_core/Cargo.toml

@@ -32,7 +32,7 @@ ci = []
 # so we disable default-features, following: https://github.com/pykeio/ort/blob/main/Cargo.toml
 ort = { version = "2.0.0-alpha.1", default-features = true }
 
-tokenizers = { version = "0.15.0", default-features = false, features = ["progressbar", "cli", "onig", "esaxx_fast"] }
+tokenizers = { version = "0.19.0", default-features = false, features = ["progressbar", "cli", "onig", "esaxx_fast"] }
 ndarray = "0.15.6"
 
 uniffi = { version = "0.27" }