Fix formatting in changelog.
Fix formatting in changelog.

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