Add Modern Javascript Tutorial Book (Korean)

[Turtle-Hwan]

What does this PR do?

Add resource(s)

For resources

Description

Add resource of Javascript, Modern Javascript Tutorial Book
korean translated link : https://ko.javascript.info/

Why is this valuable (or not)?

This book is already in the English book list, so and I add Korean translate book.

How do we know it's really free?

This book is available on that site!

For book lists, is it a book? For course lists, is it a course? etc.

It is online site.

Checklist:

• Read our contributing guidelines.
• Search for duplicates.
• Include author(s) and platform where appropriate.
• Put lists in alphabetical order, correct spacing.
• Add needed indications (PDF, access notes, under construction).
• Used an informative name for this pull request.

Follow-up

• Check the status of GitHub Actions and resolve any reported warnings!

[github-actions]

Linter failed, fix the error(s):

free-programming-books/books/free-programming-books-ko.md
   3:1-43:22  warning  Alphabetical ordering: swap l.4 and l.3             alphabetize-lists            remark-lint
    3:1-3:18  warning  Marker style should be `*`                          unordered-list-marker-style  remark-lint
    4:1-4:44  warning  Marker style should be `*`                          unordered-list-marker-style  remark-lint
    5:1-5:42  warning  Marker style should be `*`                          unordered-list-marker-style  remark-lint
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    7:1-7:10  warning  Marker style should be `*`                          unordered-list-marker-style  remark-lint
    8:1-8:13  warning  Marker style should be `*`                          unordered-list-marker-style  remark-lint
    9:1-9:14  warning  Marker style should be `*`                          unordered-list-marker-style  remark-lint
  10:1-10:20  warning  Marker style should be `*`                          unordered-list-marker-style  remark-lint
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  17:3-17:23  warning  Marker style should be `*`                          unordered-list-marker-style  remark-lint
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  32:3-32:20  warning  Marker style should be `*`                          unordered-list-marker-style  remark-lint
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  36:1-36:16  warning  Marker style should be `*`                          unordered-list-marker-style  remark-lint
  37:1-37:22  warning  Marker style should be `*`                          unordered-list-marker-style  remark-lint
  38:1-38:14  warning  Marker style should be `*`                          unordered-list-marker-style  remark-lint
  39:1-39:48  warning  Marker style should be `*`                          unordered-list-marker-style  remark-lint
  40:1-40:28  warning  Marker style should be `*`                          unordered-list-marker-style  remark-lint
  41:1-41:28  warning  Marker style should be `*`                          unordered-list-marker-style  remark-lint
  42:1-42:22  warning  Marker style should be `*`                          unordered-list-marker-style  remark-lint
  43:1-43:22  warning  Marker style should be `*`                          unordered-list-marker-style  remark-lint
119:1-120:66  warning  Alphabetical ordering: swap l.120 and l.119         alphabetize-lists            remark-lint
120:3-120:52  warning  Remove trailing slash (https://ko.javascript.info)  no-url-trailing-slash        remark-lint

[github-actions]

Linter failed, fix the error(s):

free-programming-books/books/free-programming-books-ko.md
118:1-119:66  warning  Alphabetical ordering: swap l.119 and l.118         alphabetize-lists      remark-lint
119:3-119:52  warning  Remove trailing slash (https://ko.javascript.info)  no-url-trailing-slash  remark-lint

[github-actions]

Linter failed, fix the error(s):

free-programming-books/books/free-programming-books-ko.md
118:1-119:65  warning  Alphabetical ordering: swap l.119 and l.118  alphabetize-lists  remark-lint

[eshellman]

Thanks, and welcome to free-programming-books!

[Turtle-Hwan]

Thanks, and welcome to free-programming-books!

Thank you for fast approve & merge!!