Add a missing parameter

website/content/docs/configuration/replication.mdx

@@ -46,5 +46,9 @@ replication {
   time to see the resulting WAL present locally before returning a response to the client.
 - `allow_forwarding_via_token` `(string: "")` - When set to `new_token`, requests sent to non-active nodes
   are forwarded if the node does not yet have the token information in storage.
+- `replication_canary_write_interval_seconds` `(integer: 1)` - Enable monitoring
+  of the replication latency between the secondary cluster from its primary. It
+  publishes the value as `replication_lag` field when you invoke the replication
+  status endpoint. 
 
 Support for Server Side Consistent Tokens is now available. Refer to the [Server Side Consistent Token FAQ](/vault/docs/faq/ssct) for details.