🌐 [i18n-KO] Translated `chapter 4-1,2,4.mdx` to Korean #1852

	name: Quality Check

	on:
	push:
	branches:
	- main
	pull_request:

	jobs:
	quality:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python 3.8
	uses: actions/setup-python@v2
	with:
	python-version: 3.8
	- name: Install Python dependencies
	run: pip install black
	- name: Run Quality check
	run: make quality

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