Max Verstappen says Red Bull’s F1 rivals should “just keep your mouth shut” and refrain from jumping to ill-informed conclusions regarding rumors that his team has transgressed the sport’s budget cap rules. The word in the paddock in Singapore since Friday is that two teams breached F1’s $145,000 budget cap last season, with Red Bull and Aston Martin singled out as the alleged violators. But while the Silverstone-based outfit’s breach is believed to have been minor, Mercedes and Ferrari alluded to a significant overspend by Red Bull in 2021, and both Toto Wolff and Mattia Binotto have called for stringent…