Regenerate engine-state sequence diagram
Regenerate engine-state sequence diagram

There was a spelling mistake in the image, fix
it and regenerate it so that this spelling mistake
no longer exists.

Change-Id: I9090916fe133d979af25c5828f3006c46d59aaeb

openstack/taskflow,junneyang/taskflow,jimbobhickville/taskflow,pombredanne/taskflow-1,jimbobhickville/taskflow,junneyang/taskflow,pombredanne/taskflow-1,openstack/taskflow