Update change log to include the Action Chain pause and resume
Update change log to include the Action Chain pause and resume

Plexxi/st2,StackStorm/st2,nzlosh/st2,Plexxi/st2,nzlosh/st2,nzlosh/st2,StackStorm/st2,StackStorm/st2,Plexxi/st2,Plexxi/st2,StackStorm/st2,nzlosh/st2