i18n(ko-KR): update content-loader-reference

[jsparkdev]

Description (required)

• Fix code snippets in the Content Loader reference #14354

[astrobot-houston]

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ko/reference/content-loader-reference.mdx	Localization changed, will be marked as complete.

Warnings reference

Icon	Description
🔄️	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.

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[ArmandPhilippot]

Thank you, LGTM!