Add missing empty line

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Michele Tartara <mtartara@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

doc/design-linuxha.rst

@@ -110,6 +110,7 @@ offline the node. Any other work to restore instance availability should
 then be done by the autorepair system.
 
 The following cluster tags are supported:
+
 - ``ocf:node-offline:use-powercycle``: Try to powercycle a node using
   ``gnt-node powercycle`` when offlining.
 - ``ocf:node-offline:use-poweroff``: Try to power off a node using