gabrielwithappy

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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