Bump tokenizers from 0.19.1 to 0.20.0 in /pytorch in the pytorch group

Bumps the pytorch group in /pytorch with 1 update: [tokenizers](https://github.com/huggingface/tokenizers).


Updates `tokenizers` from 0.19.1 to 0.20.0
- [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
  update-type: version-update:semver-minor
  dependency-group: pytorch
...

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

Author: dependabot[bot]

pytorch/hf-genai-requirements.txt

@@ -9,5 +9,5 @@ protobuf==5.28.1
 py-cpuinfo==9.0.0
 scikit-learn==1.5.2
 SentencePiece==0.2.0
-tokenizers==0.19.1
+tokenizers==0.20.0
 transformers==4.44.2