Fixing persona hover from recent MSFT update

Per PnP running into the same issue, pnp/sp-dev-fx-controls-react#1241, adding legacyUpn to createElement props

src/webparts/spContactCard/components/SPFXPeopleCard/SPFxPeopleCard.tsx

@@ -118,6 +118,7 @@ export default class SPFxPeopleCard extends React.PureComponent<IPeopleCardProps
             },
             serviceScope: this.props.serviceScope,
             upn: this.props.email,
+            legacyUpn: this.props.email,
             onCardOpen: () => {
                 if(this.props.onCardOpenCallback){
                     this.props.onCardOpenCallback();