docs(popovers): correctly document `nglPopoverToggled`
docs(popovers): correctly document `nglPopoverToggled`

ihym/ng-lightning,ihym/ng-lightning,dballance/ng-lightning,ppolyzos/ng-lightning,esarbanis/ng-lightning,ng-lightning/ng-lightning,dballance/ng-lightning,esarbanis/ng-lightning,dballance/ng-lightning,ppolyzos/ng-lightning,esarbanis/ng-lightning,ng-lightning/ng-lightning,ppolyzos/ng-lightning,ihym/ng-lightning