Improvement: Correct the "empty" link in Dynamic Admission Control.

Author: Shubham82

content/en/docs/reference/access-authn-authz/extensible-admission-controllers.md

@@ -67,7 +67,7 @@ See the [webhook request](#request) section for details on the data sent to webh
 See the [webhook response](#response) section for the data expected from webhooks.
 
 The example admission webhook server leaves the `ClientAuth` field
-[empty](https://github.com/kubernetes/kubernetes/blob/v1.13.0/test/images/webhook/config.go#L47-L48),
+[empty](https://github.com/kubernetes/kubernetes/blob/v1.22.0/test/images/agnhost/webhook/config.go#L38-L39),
 which defaults to `NoClientCert`. This means that the webhook server does not
 authenticate the identity of the clients, supposedly apiservers. If you need
 mutual TLS or other ways to authenticate the clients, see