Sixth Korean l10n work for release 1.18

- Update outdated files in dev-1.18-ko.6 partly (#21714)
- Translate StorageClass to Korean word (#21805)
- Translate StatefulSet to Korean word in pods.md (#21794)
- Translate tasks/run-application/delete-stateful-set/ in Korean (#21686)
- Translate tasks/administer-cluster/change-default-storage-class in Korean (#21801)
- update outdated docs (#21940)
- Modify spacing term StatefulSet in Korean (#21871)
- Translate /tasks/administer-cluster/coredns in Korean (#21876)
- Fix typo in k8s.io/ko/docs/contribute/new-content/new-content/ (#21975)
- Translation error correction in /concepts/containers/runtime-class.md (#21868)
- Translate tasks/tls/certificate-rotation/ in Korean (#21838)
- Translate /tasks/configure-pod-container/static-pod in Korean (#21798)
- Update to Outdated files in the dev-1.18-ko.6 branch - (1/4) (#21911)
- Fix English bugs in Korean documentation (#21994)
- Update outdated dev-1.18-ko.6 partly (#22067)

Co-authored-by: Jerry Park <jaehwa@gmail.com>
Co-authored-by: PyungHo Yoon <learder@gmail.com>
Co-authored-by: Yuk, Yongsu <ysyukr@gmail.com>
Co-authored-by: Jerry Park <jaehwa@gmail.com>
Co-authored-by: Seokho Son <shsongist@gmail.com>
Co-authored-by: Jordy Ruiter <jordy.ruiter@gmail.com>
Co-authored-by: bluefriday <bluefriday86@gmail.com>
Co-authored-by: Dajin Gwon <d.gweon@samsung.com>
Co-authored-by: Hyungseok Lee <hs0426.lee@samsung.com>
Co-authored-by: Jihoon Seo <jihoon.seo@etri.re.kr>
Co-authored-by: coolguyhong <podolsmith@naver.com>
Co-authored-by: jmyung <jesang.myung@gmail.com>
Co-authored-by: June Yi <june.yi@samsung.com>

content/ko/docs/tutorials/stateless-application/guestbook-logs-metrics-with-elk.md

@@ -1,6 +1,5 @@
 ---
 title: "예제: PHP / Redis 방명록 예제에 로깅과 메트릭 추가"
-reviewers:
 content_type: tutorial
 weight: 21
 card:
@@ -406,4 +405,3 @@ kubectl scale --replicas=3 deployment/frontend
 * [로깅 아키텍처](/docs/concepts/cluster-administration/logging/)를 더 읽어본다.
 * [애플리케이션 검사 및 디버깅](/ko/docs/tasks/debug-application-cluster/)을 더 읽어본다.
 * [애플리케이션 문제 해결](/ko/docs/tasks/debug-application-cluster/resource-usage-monitoring/)을 더 읽어본다.
-

content/ko/docs/tutorials/stateless-application/guestbook.md

@@ -369,4 +369,3 @@ Google Compute Engine 또는 Google Kubernetes Engine과 같은 일부 클라우
 * [애플리케이션 접속](/ko/docs/concepts/services-networking/connect-applications-service/)에 대해 더 알아보기
 * [자원 관리](/docs/concepts/cluster-administration/manage-deployment/#using-labels-effectively)에 대해 더 알아보기
 
-