fix(docs): typo in closing tag of a <Message> block

Author: Bibas

observability/cockpit/how-to/send-log-from-k8s-to-cockpit.mdx

@@ -28,7 +28,7 @@ In this example, we use [k8s-monitoring](https://artifacthub.io/packages/helm/gr
 
 <Message type="important">
   - Sending logs for Scaleway resources or personal data using an external path is a billable feature. In addition, any data that you push yourself is billed, even if you send data from Scaleway products. Refer to the [product pricing](https://www.scaleway.com/en/pricing/?tags=available,managedservices-observability-cockpit) for more information.
-<Message/>
+</Message>
 
 ## Configure the Helm chart