Change attb name from updated_at_time to updated_at_apid

apigee_sync.go

diff --git a/apigee_sync.go b/apigee_sync.go
index 76ea2bf..947fc29 100644
--- a/apigee_sync.go
+++ b/apigee_sync.go
@@ -22,7 +22,7 @@
 	req.Header.Add("Authorization", "Bearer "+token)
 	req.Header.Set("apid_instance_id", guuid)
 	req.Header.Set("apid_cluster_Id", gapidConfigId)
-	req.Header.Set("updated_at_time", time.Now().Format(time.RFC3339))
+	req.Header.Set("updated_at_apid", time.Now().Format(time.RFC3339))
 }
 
 func donehandler(e apid.Event) {