chore(docs): popover close delay
chore(docs): popover close delay

The attribute for the close delay on the popover was incorrectly
documented as 'popover-close-popup-delay' and should be
'popover-popup-close-delay.

Closes #4698

angular-ui/bootstrap,christor/bootstrap,mabi/bootstrap,shiftagent/ui-bootstrap,shiftagent/ui-bootstrap,connyay/bootstrap,byronigoe/bootstrap,Servoy/bootstrap,wesleycho/bootstrap,benhalverson/bootstrap,looker/bootstrap,infowrap/bootstrap,pdsoftplan/bootstrap,vfiles/bootstrap,Servoy/bootstrap,burlhock/bootstrap,Foxandxss/bootstrap,icfantv/bootstrap,matteopic/bootstrap,pdsoftplan/bootstrap,icfantv/bootstrap,292388900/bootstrap,justin-john/bootstrap-1,Kpler/bootstrap,deeg/bootstrap,fpipita/bootstrap,davious/angular-ui-bootstrap,burlhock/bootstrap,matteopic/bootstrap,BookingBug/bootstrap,shootermv/bootstrap,angular-ui/bootstrap,benhalverson/bootstrap,guaido79/bootstrap,fpipita/bootstrap,BookingBug/bootstrap,byronigoe/bootstrap,Foxandxss/bootstrap,Lincoln-xzc/angular-ui-bootstrap,caoruiy/bootstrap,shootermv/bootstrap,looker/bootstrap,RobJacobs/bootstrap,RobJacobs/bootstrap,vfiles/bootstrap,Lincoln-xzc/angular-ui-bootstrap,mabi/bootstrap,Kpler/bootstrap,292388900/bootstrap,wesleycho/bootstrap,benhalverson/bootstrap,deeg/bootstrap,davious/angular-ui-bootstrap,christor/bootstrap,infowrap/bootstrap,connyay/bootstrap,guaido79/bootstrap,justin-john/bootstrap-1,caoruiy/bootstrap,benhalverson/bootstrap