Add kr8s to community Python libraries list (kubernetes#42894)

* Add kr8s to client-libraries.md

* Update content/en/docs/reference/using-api/client-libraries.md

Co-authored-by: Tim Bannister <tim@scalefactory.com>

---------

Co-authored-by: Tim Bannister <tim@scalefactory.com>

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

@@ -71,6 +71,7 @@ their authors, not the Kubernetes team.
 | PHP                  | [github.com/renoki-co/php-k8s](https://github.com/renoki-co/php-k8s) |
 | Python               | [github.com/fiaas/k8s](https://github.com/fiaas/k8s) |
 | Python               | [github.com/gtsystem/lightkube](https://github.com/gtsystem/lightkube) |
+| Python               | [github.com/kr8s-org/kr8s](https://github.com/kr8s-org/kr8s) |
 | Python               | [github.com/mnubo/kubernetes-py](https://github.com/mnubo/kubernetes-py) |
 | Python               | [github.com/tomplus/kubernetes_asyncio](https://github.com/tomplus/kubernetes_asyncio) |
 | Python               | [github.com/Frankkkkk/pykorm](https://github.com/Frankkkkk/pykorm) |