How to renew a certificate in Kubernetes 1.12

I am trying to renew my certificate on a system running Kubernetes version 1.12. Is there any way? No matter how much I google it, I can't see it.

https://stackoverflow.com/questions/65894559/how-to-renew-a-certificate-in-kubernetes-1-12 January 26, 2021 at 09:07AM