chore(deps): update tokenizers requirement from 0.19.1 to 0.20.0

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@v0.19.1...v0.20.0)

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

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

Author: dependabot[bot]

examples/candle_whisper/Cargo.toml

@@ -36,7 +36,7 @@ candle-core = { git = "https://github.com/huggingface/candle" }
 candle-nn = { git = "https://github.com/huggingface/candle" }
 candle-transformers = { git = "https://github.com/huggingface/candle" }
 
-tokenizers = { version = "0.19.1", features = ["onig"] }
+tokenizers = { version = "0.20.0", features = ["onig"] }
 rand = "0.8.5"
 serde_json = "1.0.120"
 byteorder = "1.5.0"