i18n(ko-KR): update configuration-reference.mdx

[jsparkdev]

Description (required)

• update configuration-reference.mdx
• docs: fix entry variable #9188

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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.

[yanthomasdev]

LGTM! Good job!