CHange changelog message and pass current_user as author in audit event

changelogs/unreleased/services-usage-1.yml

 ---
-title: Use Keys::CreateService to create ssh keys for a user
+title: Record audit event when creating a new SSH Key via the API
 merge_request: 33859
 author: Rajendra Kadam
 type: fixed

ee/app/services/ee/keys/create_service.rb

@@ -14,7 +14,7 @@ module EE
       end
 
       def audit_event_service
-        ::AuditEventService.new(user,
+        ::AuditEventService.new(current_user,
                                 user,
                                 action: :custom,
                                 custom_message: 'Added SSH key',