i18n(ko-KR): update `frontmatter.md` #8606

Job	Run time
Check for accessibility issues	2m 55s
Run type checks	45s
changes	6s
Docs site builds on Windows	1m 42s
Check for broken links	1m 7s
Run unit tests	0s
Run E2E tests (${{ matrix.os }})	0s
	6m 35s

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