[TYPO] fix typo/format in quicktour.md
Author: lishukan
Pull request: yes

# What does this PR do?

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Fixes some typo/format error:
![image](https://github.com/huggingface/transformers/assets/23066239/8266489c-9c09-4231-aeff-6b6eaa3f0e3e)

![image](https://github.com/huggingface/transformers/assets/23066239/26427cfe-ac3d-4f10-9436-8790ea37e88c)

It's  due to a lack of blank lines before code markup.

## Before submitting
- [X] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
- [X] Did you read the [contributor guideline](https://github.com/huggingface/transformers/blob/main/CONTRIBUTING.md#start-contributing-pull-requests),
      Pull Request section?
- [ ] Was this discussed/approved via a Github issue or the [forum](https://discuss.huggingface.co/)? Please add a link
      to it if that's the case.
- [ ] Did you make sure to update the documentation with your changes? Here are the
      [documentation guidelines](https://github.com/huggingface/transformers/tree/main/docs), and
      [here are tips on formatting docstrings](https://github.com/huggingface/transformers/tree/main/docs#writing-source-documentation).
- [ ] Did you write any new necessary tests?


## Who can review?
@sgugger, @stevhliu and @MKhalusova

Anyone in the community is free to review the PR once the tests have passed. Feel free to tag
members/contributors who may be interested in your PR.

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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: @sgugger

Integrations:

- deepspeed: HF Trainer/Accelerate: @pacman100
- ray/raytune: @richardliaw, @amogkam

Documentation: @sgugger, @stevhliu and @MKhalusova

HF projects:

- accelerate: [different repo](https://github.com/huggingface/accelerate)
- 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)

Maintained examples (not research project or legacy):

- Flax: @sanchit-gandhi
- PyTorch: @sgugger
- TensorFlow: @Rocketknight1

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Comments:
The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_25519). All of your documentation changes will be reflected on that endpoint.

@sgugger    Hi, Dear sgugger   , I met some problem on this PR.
It failed on the test [ check_circleci_user  ]. what should i do can solve it ?
I've spend lots of time to search document/question about this ，and the 
question link: [ https://support.circleci.com/hc/en-us/articles/360008097173-Troubleshooting-why-pull-requests-are-not-triggering-jobs-on-my-organization- ](https://support.circleci.com/hc/en-us/articles/360008097173-Troubleshooting-why-pull-requests-are-not-triggering-jobs-on-my-organization-) in test log  was invalid. 
Only i can do is just looking help from you,sorry about  waste your precious time

 
<img width="920" alt="image" src="https://github.com/huggingface/transformers/assets/23066239/efec63e9-9c39-49c8-9b76-e1fbaa729a22">



> I've pushed your branch to the main fork of Transformers, which re-triggers the tests. Normally there shouldn't be any problem since you are only touching doc files, but let's double-check!

Tanks a lot