Sixth Korean l10n work for release-1.16 (#17962)

* Update _index.md (#17762)
* Update apparmor.md (#17767)
* Update hello-minikube.md (#17771)
* Update guestbook.md (#17773)
* Update localization_ko.md (#17777)
* Fix grammatical errors (#17776)
* Translate /docs/reference/issues-security/security.md in Korea (#17763)
* Create issues.md (#17765)
* Update basic-stateful-set.md (#17774)
* Fixed typo ko/docs/concepts/overview/components.md (#17778)
* Modify typo. (#17802)
* Update cloud-controller.md (#17760)
* Update file outdated korean docs in dev-1.16-ko.6. (#17772)
* Translate concepts/services-networking/ingress-controller in Korean (#17858)
* Update ingress-controller.md
* Translate services-networking/ingress.md in Korean. (#17807)
* Fix grammatical errors (#17775)
* Translate docs/contribute/style/write-new-topic.md in Korean (#17758)

Co-Authored-By: const-k <kss07120@gmail.com>
Co-Authored-By: Yuk, Yongsu <ysyukr@gmail.com>
Co-Authored-By: power8993 <37264128+power8993@users.noreply.github.com>
Co-Authored-By: reung37 <49059415+reung37@users.noreply.github.com>
Co-Authored-By: Chihoon-Sung <55041611+Chihoon-Sung@users.noreply.github.com>
Co-Authored-By: Claudia J.Kang <claudiajkang@gmail.com>
Co-Authored-By: Seokho Son <shsongist@gmail.com>

content/ko/docs/setup/_index.md

@@ -79,7 +79,7 @@ card:
 | [Docker Enterprise](https://www.docker.com/products/docker-enterprise) |       |✔  | ✔     |  |     | ✔
 | [Fedora (멀티 노드)](https://kubernetes.io/docs/getting-started-guides/fedora/flannel_multi_node_cluster/)     |      |  |      | |    ✔       | ✔
 | [Fedora (단일 노드)](https://kubernetes.io/docs/getting-started-guides/fedora/fedora_manual_config/)     |      |  |      | |           | ✔
-| [Gardener](https://gardener.cloud/) | ✔ | ✔ | ✔ (via OpenStack) | ✔ | |
+| [Gardener](https://gardener.cloud/) | ✔ | ✔ | ✔ | ✔ | ✔ | [사용자 정의 확장](https://github.com/gardener/gardener/blob/master/docs/extensions/overview.md) |
 | [Giant Swarm](https://giantswarm.io/)     | ✔       | ✔ |   ✔    |     |
 | [Google](https://cloud.google.com/)           |  [Google Kubernetes Engine (GKE)](https://cloud.google.com/kubernetes-engine/)       | [Google Compute Engine (GCE)](https://cloud.google.com/compute/)|[GKE On-Prem](https://cloud.google.com/gke-on-prem/)       |  |  |     |  |      |       |  |
 | [IBM](https://www.ibm.com/in-en/cloud)        | [IBM Cloud Kubernetes Service](https://cloud.ibm.com/kubernetes/catalog/cluster)| |[IBM Cloud Private](https://www.ibm.com/in-en/cloud/private) | |
@@ -94,6 +94,7 @@ card:
 | [Mirantis Cloud Platform](https://www.mirantis.com/software/kubernetes/)    |       |  | ✔ |  |    |
 | [Nirmata](https://www.nirmata.com/)          |              |   ✔     | ✔            |      |          |
 | [Nutanix](https://www.nutanix.com/en)         | [Nutanix Karbon](https://www.nutanix.com/products/karbon)             | [Nutanix Karbon](https://www.nutanix.com/products/karbon)       |             |      | [Nutanix AHV](https://www.nutanix.com/products/acropolis/virtualization)         |
+| [OpenNebula](https://www.opennebula.org)          |[OpenNebula Kubernetes](https://marketplace.opennebula.systems/docs/service/kubernetes.html)              |        |            |      |   |
 | [OpenShift](https://www.openshift.com)          |[OpenShift Dedicated](https://www.openshift.com/products/dedicated/) and [OpenShift Online](https://www.openshift.com/products/online/)              |        | [OpenShift Container Platform](https://www.openshift.com/products/container-platform/)            |      |  [OpenShift Container Platform](https://www.openshift.com/products/container-platform/)        |[OpenShift Container Platform](https://www.openshift.com/products/container-platform/)
 | [Oracle Cloud Infrastructure Container Engine for Kubernetes (OKE)](https://docs.cloud.oracle.com/iaas/Content/ContEng/Concepts/contengoverview.htm)          | ✔             |   ✔     |             |      |          |
 | [oVirt](https://www.ovirt.org/)         |              |        |             |     | ✔          |