Forth Korean l10n work for release-1.19

- Fix ko glossary managed service title (#24621)
- Translate reference/glossary/service-broker.md in Korean (#24632)
- Translate reference/command-line-tools-reference/kubelet-authentication-authorization.md into korean (#24623)
- Update outdated files in the dev-1.19-ko.4 branch (#24622)
- Translate setup/production-environment/tools/kubeadm/self-hosting/ into Korean (#24655)
- Translate reference/kubectl/kubectl.md into Korean (#24482)
- docs: fix typo (#24713)
- Translate connecting-frontend-backend to Korean (#24422)
- Translate reference/kubectl/conventions.md into Korean (#24614)
- Translate k8s 1.19 relaese note in korean (#24633)

Co-authored-by: seokho-son <shsongist@gmail.com>
Co-authored-by: santachopa <santachopa@naver.com>
Co-authored-by: kosehy@gmail.com <kosehy@gmail.com>
Co-authored-by: Jerry Park <jaehwa@gmail.com>
Co-authored-by: markruler <csu0414@gmail.com>
Co-authored-by: noel <neutiyoo@gmail.com>
Co-authored-by: coolguyhong <podolsmith@naver.com>
Co-authored-by: chhanz <han0495@gmail.com>
Co-authored-by: bluefriday <bluefriday86@gmail.com>

content/ko/docs/reference/using-api/client-libraries.md

@@ -60,6 +60,7 @@ API 호출 또는 요청/응답 타입을 직접 구현할 필요는 없다.
 | PHP                  | [github.com/allansun/kubernetes-php-client](https://github.com/allansun/kubernetes-php-client) |
 | PHP                  | [github.com/maclof/kubernetes-client](https://github.com/maclof/kubernetes-client) |
 | PHP                  | [github.com/travisghansen/kubernetes-client-php](https://github.com/travisghansen/kubernetes-client-php) |
+| PHP                  | [github.com/renoki-co/php-k8s](https://github.com/renoki-co/php-k8s) |
 | Python               | [github.com/eldarion-gondor/pykube](https://github.com/eldarion-gondor/pykube) |
 | Python               | [github.com/fiaas/k8s](https://github.com/fiaas/k8s) |
 | Python               | [github.com/mnubo/kubernetes-py](https://github.com/mnubo/kubernetes-py) |