Korean translation for package-manager.md

[taggon]

This PR fixes some missing Korean translations in #1832.

ref nodejs/nodejs-ko#763
cc @nodejs/nodejs-ko

[yous]

LGTM but one comment.

[yous]

Is there a way to enforce to generate anchor with specified name? Variations between languages can make some confusions.

[yous]

@taggon Can you give me a feedback of the suggestion?

[ghost]

@taggon & @yous：The reason is that if you use "##" to generate an anchor and there's something out of 26 English alphabets, it will be ignored. And I've submitted this fixture you can have a review for that, this can keep what it is in the English version.

See：#2028. Hope it helps you :)

[ghost]

@yous：Help you to fix this anchor link problem, and you all can continue with #1994 :)

[yous]

@Maledong It seems that h2 has the id, and a has an additional aria-labelledby attribute on the English site: https://nodejs.org/en/download/package-manager/

<h2id="header-android">Android<aname="android" class="anchor" href="#android" aria-labelledby="header-android"></a></h2>

[ghost]

@yous：Yeah, I've noticed that but it doesn't effect, and everything seems fine, if we keep the name, link the same name as what we see in the title.

[yous]

@Maledong Got it, thanks! I think this is ready to be merged.

[yous]

Oh wait, the file has multiple headers with CJK.

[ghost]

@yous：No problem. If anything else welcome to have a discussion with me or all of you here to fix it:)

[yous]

@Maledong Thank you for participating and fixing this issue! Now it's really ready to be merged.

[ghost]

Nice! Thanks and I've helped to merge your change.