[docstring] Fix docstring for `CodeLlamaTokenizer`
Author: Bojun-Feng
Pull request: yes

# What does this PR do?

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Fixes #26638


## Before submitting
- [X] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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Models:

- text models: @ArthurZucker and @younesbelkada
- vision models: @amyeroberts
- speech models: @sanchit-gandhi
- graph models: @clefourrier

Library:

- flax: @sanchit-gandhi
- generate: @gante
- pipelines: @Narsil
- tensorflow: @gante and @Rocketknight1
- tokenizers: @ArthurZucker
- trainer: @muellerzr and @pacman100

Integrations:

- deepspeed: HF Trainer/Accelerate: @pacman100
- ray/raytune: @richardliaw, @amogkam
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Documentation: @stevhliu and @MKhalusova

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- datasets: [different repo](https://github.com/huggingface/datasets)
- diffusers: [different repo](https://github.com/huggingface/diffusers)
- rust tokenizers: [different repo](https://github.com/huggingface/tokenizers)

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Comments:
@ydshieh 

PR for `CodeLlamaTokenizer`, as mentioned in #26666 

Could you share how you fix the env. issue to get it work? Thanks a lot!

The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_26709). All of your documentation changes will be reflected on that endpoint.

> Could you share how you fix the env. issue to get it work? Thanks a lot!

Running `pip install -e ".[dev-torch]"` fixed the issue for me.