i18n(ko-KR): update astro-content.mdx

[jsparkdev]

Description (required)

• fix: update type of CollectionEntry ids #11435
• docs: update reference() documentation to match Astro v5 behavior #11333

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🔄️	The source for this localization has been updated since the creation of this pull request, make sure all changes in the source have been applied.

[dreyfus92]

LGTM ✅