Red Bull have introduced a major upgrade package onto their car at the Hungarian Grand Prix this weekend. They’re trying to re-establish the advantage they had over McLaren, Mercedes and Ferrari. They started the year in truly ominous fashion with four wins and three one-two finishes in the first five races. Nobody could even get close to Max Verstappen when his car was running smoothly. But then their rivals’ upgrades started to kick in. McLaren played their hand in Miami, Ferrari followed at Imola and Mercedes transformed their campaign soon after. Verstappen has now won three of the last se…