🌐 [i18n-KO] Translated `tasks/image_captioning.mdx` to Korean
Author: sim-so
Pull request: yes

# What does this PR do?

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Translated the `tasks/image_captioning.mdx` file of the documentation to Korean.
Thank you in advance for your review!

- [x] 이미지 캡셔닝 Image captioning
  - [x] 포켓몬 BLIP 데이터셋 가져오기 Load the Pokémon BLIP captions dataset
  - [x] 데이터셋 전처리 Preprocess the dataset
  - [x] 기본 모델 가져오기 Load a base model
  - [x] 평가 Evaluate
  - [x] 학습! Train!
  - [x] 추론 Inference

Part of https://github.com/huggingface/transformers/issues/20179

## 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.
- [x] 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?

This is a work on progress.
Could you review this PR when I finish this work?
@0525hhgus, @KIHOON71, @sim-so, @gabrielwithappy, @HanNayeoniee, @wonhyeongseo, @jungnerd

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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: @stas00, 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 documentation is not available anymore as the PR was closed or merged._

I quickly done it! 😅 
Would you review this PR?

LGTM! 🤗 

Happy Wednesday!
Could you review this PR? 😃
@sgugger, @ArthurZucker, @eunseojo