Seventh Korean l10n work for release 1.18

- Translate reference/command-line-tools-reference/feature-gates.md int… (#22240)
- Fix issue of broken links to translated docs (#22105)
- Fix issue of document link in some ko documents (#22379)
- Translate tasks/administer-cluster/access-cluster-services.md into Ko… (#21776)
- Fix issue with 'Linux' and 'Windows' notation in Korean docs (#22362)
- Fix issue of broken links to translated docs #2 (#22270)
- Fix issue with k8s.io/ko/docs/concepts/overview/kubernetes-api.md (#22261)
- Fix issue with k8s.io/ko/docs/concepts/overview/working-with-objects/ (#22263)
- Fix incorrect notation of 'directory' into Korean (#22155)
- Fix issue with k8s.io/ko/docs/concepts/overview/components.md (#22232)
- Update outdated files in dev-1.18-ko.7 (#22128)
- Modify spacing term ReplicaSet in Korean (#22148)
- Translate tasks/administer-cluster/extended-resource-node.md into Korean (#21849)
- Translate tasks/administer-cluster/access-cluster-api.md into Korean (#21730)

Co-authored-by: Jerry Park <jaehwa@gmail.com>
Co-authored-by: woopyoung <ywp041@gmail.com>
Co-authored-by: coolguyhong <podolsmith@naver.com>
Co-authored-by: PyungHo Yoon <learder@gmail.com>
Co-authored-by: Seokho Son <shsongist@gmail.com>
Co-authored-by: jmyung <jesang.myung@gmail.com>
Co-authored-by: Ian Y. Choi <ianyrchoi@gmail.com>

content/ko/docs/tasks/network/validate-dual-stack.md

@@ -12,7 +12,7 @@ content_type: task
 
 
 * 이중 스택 네트워킹을 위한 제공자 지원 (클라우드 제공자 또는 기타 제공자들은 라우팅 가능한 IPv4/IPv6 네트워크 인터페이스를 제공하는 쿠버네티스 노드들을 제공해야 한다.)
-* 이중 스택을 지원하는 [네트워크 플러그인](/docs/concepts/extend-kubernetes/compute-storage-net/network-plugins/)  (예. Kubenet 또는 Calico)
+* 이중 스택을 지원하는 [네트워크 플러그인](/ko/docs/concepts/extend-kubernetes/compute-storage-net/network-plugins/)  (예. Kubenet 또는 Calico)
 * IPVS 모드로 구동되는 Kube-proxy
 * [이중 스택 활성화](/ko/docs/concepts/services-networking/dual-stack/) 클러스터
 
@@ -155,5 +155,3 @@ my-service   ClusterIP   fe80:20d::d06b   <none>        80/TCP    9s
 NAME         TYPE        CLUSTER-IP       EXTERNAL-IP                     PORT(S)        AGE
 my-service   ClusterIP   fe80:20d::d06b   2001:db8:f100:4002::9d37:c0d7   80:31868/TCP   30s
 ```
-
-