corrected name and added link (#13562)

Author: dedamico

website/content/docs/concepts/client-count/index.mdx

@@ -111,7 +111,7 @@ The number of active clients using a Vault cluster is the total of:
 that is not associated with an entity
 
 Prior to Vault 1.6, this metric could only be measured from the audit log, using the
-`vault-advisor` tool. Starting with Vault 1.6, the number of clients per month, or for
+[`vault-auditor`](https://learn.hashicorp.com/tutorials/vault/usage-metrics#vault-auditor-tool) tool. Starting with Vault 1.6, the number of clients per month, or for
 a contiguous sequence of months, can be measured by Vault itself.
 
 As of Vault 1.9, the total client count should always be measured using Vault itself. The