Update common-attributes.adoc to resolve formatting issues

Signed-off-by: A.Arnold <anarnold@redhat.com>

Author: anarnold97

_attributes/common-attributes.adoc

@@ -236,14 +236,13 @@ endif::[]
 :coo-first: Cluster Observability Operator (COO)
 :coo-full: Cluster Observability Operator
 :coo-short: COO
-//ODF
+// ODF
 :odf-first: Red Hat OpenShift Data Foundation (ODF)
 :odf-full: Red Hat OpenShift Data Foundation
 :odf-short: ODF
 :rh-dev-hub: Red Hat Developer Hub
-//IBU
+// IBU
 :lcao: Lifecycle Agent
-
 // Cloud provider names
 // Alibaba Cloud
 :alibaba: Alibaba Cloud