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- Update outdated files in dev-1.18-ko.6 partly (#21714)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- update outdated docs (#21940)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- Update to Outdated files in the dev-1.18-ko.6 branch - (1/4) (#21911)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- Update outdated dev-1.18-ko.6 partly (#22067)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/tasks/run-application/run-single-instance-stateful-application.md

@@ -1,37 +1,39 @@
 ---
 title: 단일 인스턴스 스테이트풀 애플리케이션 실행하기
-content_template: templates/tutorial
+content_type: tutorial
 weight: 20
 ---
 
-{{% capture overview %}}
+<!-- overview -->
 
 이 페이지에서는 쿠버네티스 클러스터에서 퍼시스턴트볼륨(PersistentVolume)과 디플로이먼트(Deployment)를 
 사용하여, 단일 인스턴스 스테이트풀 애플리케이션을 실행하는 방법을 보인다.
 해당 애플리케이션은 MySQL이다.
 
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+## {{% heading "objectives" %}}
+
 
 * 사용자 환경의 디스크를 참조하는 퍼시스턴트볼륨 생성하기
 * MySQL 디플로이먼트 생성하기
 * 알려진 DNS 이름으로 클러스터의 다른 파드에 MySQL 서비스 노출하기
 
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+## {{% heading "prerequisites" %}}
 
 * {{< include "task-tutorial-prereqs.md" >}} {{< version-check >}}
 
 * {{< include "default-storage-class-prereqs.md" >}}
 
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+<!-- lessoncontent -->
 
 ## MySQL 배포하기
 
@@ -180,10 +182,11 @@ kubectl delete pv mysql-pv-volume
 일부 동적 프로비저너(EBS 와 PD와 같은)는 
 퍼시스턴트볼륨을 삭제할 때에 기본 리소스도 해제한다.
 
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 * [디플로이먼트 오브젝트](/ko/docs/concepts/workloads/controllers/deployment/)에 대해 더 배워 보기
 
@@ -193,4 +196,6 @@ kubectl delete pv mysql-pv-volume
 
 * [볼륨](/ko/docs/concepts/storage/volumes/)과 [퍼시스턴트 볼륨](/ko/docs/concepts/storage/persistent-volumes/)
 
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