Add gov note for audit event forwarding (#21000)

* Update forwarding_audit_events.md

* Update content/en/account_management/audit_trail/forwarding_audit_events.md

* Update content/en/account_management/audit_trail/forwarding_audit_events.md

* Update content/en/account_management/audit_trail/forwarding_audit_events.md

Author: maycmlee

content/en/account_management/audit_trail/forwarding_audit_events.md

@@ -8,7 +8,15 @@ further_reading:
   text: "Learn more about Audit Trail"
 ---
 
+{{% site-region region="gov" %}}
+<div class="alert alert-warning">
+Audit Event Forwarding is not available in the US1-FED site.
+</div>
+{{% /site-region %}}
+
+{{% site-region region="US,US3,US5,EU,AP1" %}}
 <div class="alert alert-warning">Audit Event Forwarding is in beta. </div>
+{{% /site-region %}}
 
 ## Overview
 
@@ -78,4 +86,4 @@ Audit Event Forwarding allows you to send audit events from Datadog to custom de
 
 [1]: https://ip-ranges.datadoghq.com/
 [2]: https://app.datadoghq.com/organization-settings/audit-trail-settings
-[3]: /logs/explorer/search_syntax/
+[3]: /logs/explorer/search_syntax/