Sixth Korean l10n work for release-1.13 (#12705)

* ko: Update outdated files in dev-1.13-ko.6 (#12456)

* Translate concepts/containers/runtime-class.md in Korean (#12459)

* Fix ko translation consistency for commandlinetool word (#12626)

* Added Korean localization guide (#12597)

* Translate containers/images.md in Korean (#12549)

* Translate container-lifecycle-hooks.md in Korean (#12534)

* Translate tasks/run-application/horizontal-pod-autoscale in Korean (#12565)

* Translate concepts/architecture/cloud-controller in Korean #11964 (#12483)

* ko-trans: add setup/certificate.md #12453 (#12520)

Co-authored-by:    Claudia J.Kang <claudiajkang@gmail.com>
Co-authored-by:    June Yi <june.yi@samsung.com>
Co-authored-by:    Seokho <shsongist@gmail.com>
Co-authored-by:    Jesang Myung <jesang.myung@gmail.com>
Co-authored-by:    Kim Young Dae <38598117+zer0big@users.noreply.github.com>
Co-authored-by:    Yoon <learder@gmail.com>

content/ko/docs/concepts/overview/what-is-kubernetes.md

@@ -51,7 +51,7 @@ Infrastructure as a Service (IaaS)의 유연함을 더해 주며, 인프라스
 
 추가로, [쿠버네티스 컨트롤 플레인](/docs/concepts/overview/components/)은
 개발자와 사용자가 공통으로 사용할 수 있는 [API](/docs/reference/using-api/api-overview/)를
-기반으로 하고 있다. 사용자는 범용의 [명령줄 도구]((/docs/user-guide/kubectl-overview/))를
+기반으로 하고 있다. 사용자는 범용의 [커맨드라인 툴]((/docs/user-guide/kubectl-overview/))을
 대상으로 하는 [자체 API](/docs/concepts/api-extension/custom-resources/)를 가진
 [스케줄러](https://github.com/kubernetes/community/blob/{{< param "githubbranch" >}}/contributors/devel/scheduler.md)와
 같은 사용자만의 컨트롤러를 작성할 수 있다.