Add a note about Cloud ID (elastic#211)

docs/en/observability/monitor-java-app.asciidoc

@@ -422,12 +422,18 @@ use the commands that work with your system:
 include::{beats-repo-dir}/tab-widgets/install-widget-filebeat.asciidoc[]
 
 . Use the {filebeat} keystore to store {filebeat-ref}/keystore.html[secure
-settings]. Let’s store the cloud id in the keystore.
+settings]. Let’s store the Cloud ID in the keystore.
++
+[NOTE]
+=====
+Substitute the Cloud ID from your deployment in the following command.  To find your Cloud ID
+Click on your deployment in https://cloud.elastic.co/deployments
+=====
 +
 [source,bash]
 ----
 ./filebeat keystore create
-echo -n "observability-javalin-app:ZXUtY2VudHJhbC0xLmF3cy5jbG91ZC5lcy5pbyQ4NDU5M2I1YmQzYTY0N2NhYjA2MWQ3NTJhZWFhNWEzYyQzYmQwMWE2OTQ2MmQ0N2ExYjdhYTkwMzI0YjJiOTMyYQ==" | ./filebeat keystore add CLOUD_ID --stdin
+echo -n "<Your Cloud ID>" | ./filebeat keystore add CLOUD_ID --stdin
 ----
 +
 To store logs in {es} with minimal permissions, create an API key to send data from {filebeat} to {ess}.