[ko] Clean up various broken links

[tallclair]

Clean up broken links reported through the HackerOne bug bounty program.

Localized version of #32783

/committee security-response

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[seokho-son]

Hi @tallclair
Thank you for the contribution.

I have a question regarding Contiv.

https://github.com/kubernetes/website/pull/32917/files#diff-1e3d7eea6e6ef57fce9ac297762d24e73c02b1e441fa4b0fe6ad662831ea43a0R24

* [Contiv](https://contivpp.io/)는 다양한 유스케이스와 풍부한 폴리시 프레임워크를 위해 구성 가능한 네트워킹(BGP를 사용하는 네이티브 L3, vxlan을 사용하는 오버레이, 클래식 L2 그리고 Cisco-SDN/ACI)을 제공한다. Contiv 프로젝트는 완전히 [오픈소스](https://github.com/contiv)이다. [인스톨러](https://github.com/contiv/install)는 kubeadm을 이용하거나, 그렇지 않은 경우에 대해서도 설치 옵션을 모두 제공한다.

This change is not aligned with English document (the HEAD of main branch).
There is no description for Contiv in
https://github.com/kubernetes/website/blob/main/content/en/docs/concepts/cluster-administration/addons.md

---

I checked PR history regarding en/docs/concepts/cluster-administration/addons.md.

The line for Contiv in English document has been removed by your PR (#31760).
Also the line for Contiv in Korean document has been removed by PR (#32782), but this PR restore the line for Contiv in Korean document.

@tallclair Could you check #31760 includes a mistake (removing the line instead of changing URL).
If it is a mistake, please update English document first.
(PTAL @reylejano . if we need to take care anything regarding this issue)

[seokho-son]

/hold

[tallclair]

@seokho-son thanks for flagging that. I added it back in #32938

[seokho-son]

/hold cancel

[seokho-son]

Thanks! :)

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: seokho-son

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[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 076e754c964428da91bf308eba34994a77aaf548