[PR Template] audio-transformers-course

[PR Template] HF audio-transformers-course

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# What does this PR do?
Translated the multiple_choice.mdx file of the documentation to Korean.
Feel free to discuss about this PR on [discord channel](https://discord.com/channels/879548962464493619/1105153909552586812)
Thank you in advance for your review.

Part of https://github.com/huggingface/audio-transformers-course/issues/67

## Before reviewing
- [x] Check for missing / redundant translations (번역 누락/중복 검사)
- [x] Grammar Check (맞춤법 검사)
- [x] Review or Add new terms to glossary (용어 확인 및 추가)
- [x] Check Inline TOC (e.g. [[lowercased-header]])
- [x] Check live-preview for gotchas (live-preview로 정상작동 확인)

## Who can review? (Initial)
@jungnerd @jinnsp @wonhyeongseo @gabrielwithappy 

## 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/audio-transformers-course#%EF%B8%8F-contributing-a-new-chapter), Pull Request section?
- [ ] Was this discussed/approved via a Github issue or the [forum](https://discuss.huggingface.co/)? or [discord](https://discord.com/channels/879548962464493619/1105153909552586812) Please add a link
to it if that's the case.
- [ ] Did you write any new necessary tests?

## Who can review? (Final)
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@wonhyeongseo 님의 transformer doc PR템플릿을 이용했습니다! @wonhyeongseo님 감사합니다.