[GCP][CDR] Add actor.entity.id and target.entity.id fields to audit logs (#11983)

Author: kubasobon

packages/gcp/changelog.yml

@@ -1,4 +1,9 @@
 # newer versions go on top
+- version: "2.40.0"
+  changes:
+    - description: Add `actor.entity.id` and `target.entity.id` fields to audit logs.
+      type: enhancement
+      link: https://github.com/elastic/integrations/pull/11983
 - version: "2.39.0"
   changes:
     - description: Add `related.entity` field to audit logs.