Merge pull request #28780 from johngmyers/ca-naming

Use consistent terminology for the Kubernetes general CA

Author: k8s-ci-robot

content/en/docs/tasks/extend-kubernetes/configure-aggregation-layer.md

@@ -17,7 +17,7 @@ Configuring the [aggregation layer](/docs/concepts/extend-kubernetes/api-extensi
 {{< include "task-tutorial-prereqs.md" >}} {{< version-check >}}
 
 {{< note >}}
-There are a few setup requirements for getting the aggregation layer working in your environment to support mutual TLS auth between the proxy and extension apiservers. Kubernetes and the kube-apiserver have multiple CAs, so make sure that the proxy is signed by the aggregation layer CA and not by something else, like the master CA.
+There are a few setup requirements for getting the aggregation layer working in your environment to support mutual TLS auth between the proxy and extension apiservers. Kubernetes and the kube-apiserver have multiple CAs, so make sure that the proxy is signed by the aggregation layer CA and not by something else, like the Kubernetes general CA.
 {{< /note >}}
 
 {{< caution >}}