i18n(ko-KR): update v7.mdx (#14211)

Co-authored-by: Armand Philippot <59021693+ArmandPhilippot@users.noreply.github.com>

Author: jsparkdev

src/content/docs/ko/guides/upgrade-to/v7.mdx

@@ -3,7 +3,7 @@ title: Astro v7로 업그레이드
 description: 프로젝트를 Astro v7.0으로 업그레이드하는 방법.
 sidebar:
   label: v7.0
-i18nReady: false
+i18nReady: true
 ---
 import PackageManagerTabs from '~/components/tabs/PackageManagerTabs.astro'
 import { Steps } from '@astrojs/starlight/components';