Correct the Configure Certificate Rotation for the Kubelet docs.

Author: Shubham82

content/en/docs/tasks/tls/certificate-rotation.md

@@ -27,8 +27,8 @@ The kubelet uses certificates for authenticating to the Kubernetes API.  By
 default, these certificates are issued with one year expiration so that they do
 not need to be renewed too frequently.
 
-Kubernetes 1.8 contains [kubelet certificate
-rotation](/docs/reference/command-line-tools-reference/kubelet-tls-bootstrapping/), a beta feature
+Kubernetes contains [kubelet certificate
+rotation](/docs/reference/command-line-tools-reference/kubelet-tls-bootstrapping/),
 that will automatically generate a new key and request a new certificate from
 the Kubernetes API as the current certificate approaches expiration. Once the
 new certificate is available, it will be used for authenticating connections to