Minor grammar fix to help text for a key-value pair permission type
Minor grammar fix to help text for a key-value pair permission type

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