Second Korean l10n work for release 1.18

* Translate /concepts/cluster-administration/kubelet-garbage-collection in Korean (#20274)
* Translate cluster-administration/logging.md in Korean (#20409)
* Translate tasks/configure-pod-container/assign-memory-resource.md in … (#20167)
* Translate community/_index.html in Korean. (#20317)
* Translate storage/storage-classes.md in Korean. (#20310)
* Translate configuration/resource-bin-packing.md in Korean. (#20276)
* Translate extend-kubernetes/compute-storage-net/device-plugins.md (#20406)
* Translate compute-storage-net/network-plugins.md in Korean (#20407)
* Translate concepts/cluster-administration/certificates.md (#20330)
* Translate assign-pods-nodes-using-node-affinity to Korean (#20307)
* Translate cluster-administration/manage-deployment.md in Korean (#20366)
* Translate configuration/taint-and-toleration.md in Korean (#20404)
* Translate logging-elasticsearch-kibana.md in Korean (#20300)
* add anchors of subtitle in ko/docs/concepts/policy/pod-security-policy (#20399)
* Translate task/scheduling-gpus in Korean (#20212)
* Translate conceps/storage/volume-snapshots in Korean (#19955)
* Translate network/validate-dual-stack.md in Korean (#20271)
* Update to Outdated files in the dev-1.18-ko.2 branch. (#20244)
* Update to a link to the newly translated document. (#20247)

Co-Authored-By: bluefriday <bluefriday86@gmail.com>
Co-Authored-By: cometrojan <d.gweon@samsung.com>
Co-Authored-By: coolguyhong <podolsmith@naver.com>
Co-Authored-By: DongMoon Kim <dmoons.kim@gmail.com>
Co-Authored-By: Jerry Park <jaehwa@gmail.com>
Co-Authored-By: jmyung <jesang.myung@gmail.com>
Co-Authored-By: June Yi <june.yi@samsung.com>
Co-Authored-By: seokho-son <shsongist@gmail.com>
Co-Authored-By: sunminjeon <sunmin.jeon@samsung.com>
Co-Authored-By: Yuk, Yongsu <ysyukr@gmail.com>

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

@@ -1,5 +1,5 @@
 ---
-title: 쿠버네티스란 무엇인가
+title: 쿠버네티스란 무엇인가?
 description: >
   쿠버네티스는 컨테이너화된 워크로드와 서비스를 관리하기 위한 이식할 수 있고, 확장 가능한 오픈소스 플랫폼으로, 선언적 구성과 자동화를 모두 지원한다. 쿠버네티스는 크고 빠르게 성장하는 생태계를 가지고 있다. 쿠버네티스 서비스, 지원 그리고 도구들은 광범위하게 제공된다.
 content_template: templates/concept