Update use-kms-etcd-encryption.md

Encrypting Secret Data at Rest ---> Using a KMS provider for data encryption

The title of the linked page is "Using a KMS provider for data encryption" (Not "Encrypting Secret Data at Rest").

If the title ("Encrypting Secret Data at Rest") is supposed to be correct, then the link URL should be updated.

Author: shigeooooooooooo

articles/aks/use-kms-etcd-encryption.md

@@ -16,7 +16,7 @@ This article shows you how to turn on encryption at rest for your Azure Kubernet
 * Provide encryption at rest for secrets that are stored in etcd.
 * Rotate the keys in a key vault.
 
-For more information on using KMS, see [Encrypting Secret Data at Rest](https://kubernetes.io/docs/tasks/administer-cluster/kms-provider/).
+For more information on using KMS, see [Using a KMS provider for data encryption](https://kubernetes.io/docs/tasks/administer-cluster/kms-provider/).
 
 ## Prerequisites