docs(cpt): mention grafana agent deprecation (#3872)

Author: nerda-codes

observability/cockpit/api-cli/configuring-grafana-agent.mdx

@@ -15,6 +15,10 @@ categories:
 
 This page explains how to configure the Grafana agent and the Zipkin collector to push your metrics, logs, and traces. You can use it to **push your data from Scaleway resources or external resources**.
 
+<Message type="important">
+ [The Grafana agent has been deprecated by Grafana](https://grafana.com/docs/agent/latest/). Find out [how to configure Grafana Alloy](/observability/cockpit/how-to/send-metrics-with-grafana-alloy/#configuring-grafana-alloy) which is Grafana's new telemetry collector.
+</Message>
+
 <Macro id="requirements" />
 
   - [Owner](/identity-and-access-management/iam/concepts/#owner) status or [IAM permissions](/identity-and-access-management/iam/concepts/#permission) allowing you to perform actions in the intended Organization