Fifth Korean l10n work for release 1.18

- Update to Outdated files in the dev-1.18-ko.5 branch. (#21450)
- Translate tasks/run-application/run-single-instance-stateful-application in Korean (#21174)
- Translate tasks/debug-application-cluster/determine-reason-pod-failure in Korean (#21515)
- Translate tasks/manage-hugepages/scheduling-hugepages.md into Korean (#21337)
- Translate tasks/extend-kubectl/kubectl-plugins.md into Korean (#21454)
- Translate tasks/manage-daemon/rollback-daemon-set.md into Korean (#21376)
- Translate contribute/generate-ref-docs/overview in Korean (#21466)
- Translate reference/kubectl/overview.md into Korean (#21552)
- Translate configure-pod-initialization in Korean (#21600)
- Translate tasks/manage-daemon/update-daemon-set.md into Korean (#21378)

Co-authored-by: Jerry Park <jaehwa@gmail.com>
Co-authored-by: Yoon <learder@gmail.com>
Co-authored-by: Yuk, Yongsu <ysyukr@gmail.com>
Co-authored-by: Seokho Son <shsongist@gmail.com>
Co-authored-by: guslcho <jamie14@naver.com>
Co-authored-by: DongMoon Kim <dmoons.kim@gmail.com>
Co-authored-by: bluefriday <bluefriday86@gmail.com>

content/ko/docs/contribute/new-content/overview.md

@@ -54,5 +54,8 @@ CLA에 서명하지 않은 기여자의 풀 리퀘스트(pull request)는 자동
 
 PR 당 하나의 언어로 풀 리퀘스트를 제한한다. 여러 언어로 동일한 코드 샘플을 동일하게 변경해야 하는 경우 각 언어마다 별도의 PR을 연다.
 
+## 기여자를 위한 도구들
+
+`kubernetes/website` 리포지터리의 [문서 기여자를 위한 도구](https://github.com/kubernetes/website/tree/master/content/en/docs/doc-contributor-tools) 디렉터리에는 기여 여정이 좀 더 순조롭게 진행되도록 도와주는 도구들이 포함되어 있다.