Update docs_user/modules/proc_converting-object-storage-nodes.adoc

Co-authored-by: Katie Gilligan <kgilliga@redhat.com>

Author: cschwede

docs_user/modules/proc_converting-object-storage-nodes.adoc

@@ -50,11 +50,13 @@ Specifies the node set that you want to delete.
   ports:
   +
   [NOTE]
+  ====
   The {OpenStackPreviousInstaller} deployment used different default
   ports: 6002 for the account server, 6001 for the container server, 6000 for
   the object server. The converted nodes must continue to use these same
   ports to ensure connectivity between all {object_storage} storage nodes by using
-  the unmodified rings:
+  the unmodified rings.
+  ====
 +
 ----
 cat > swift-config-patch.yaml << EOF