Update enhancement.md
Update enhancement.md

Synching with sp-dev-list-formatting samples
AJIXuMuK/sp-dev-fx-webparts,SharePoint/sp-dev-fx-webparts,SharePoint/sp-dev-fx-webparts,AJIXuMuK/sp-dev-fx-webparts,AJIXuMuK/sp-dev-fx-webparts