Follow up changes of upstream (ko)

[riseshia]

@ruby/www-ruby-lang-org-i18n-ko We can keep track of the following list of pull requests or commits on upstream. See #2818.

• en/privacy/index.md
• First pass at updating en/documentation/index.md #3427 (Translate "First pass at updating en/documentation/index.md" (ko) #3464)
• Add Rails at scale to the list of blogs #3432 (Translate "Add Rails at scale to the list of blogs" (ko) #3462)
• Improve documentation page #3456

Translation Finished (TL;DR)

• Ruby 3 4 1 released #3445 (Translate "Ruby 3.4.1 released" (ko) #3446)

[riseshia]

#3456 #3432 #3427