OTTAWA—Beijing’s hosting of the 2022 Winter Olympics offers concerned nations the chance to press China on its human rights record, Canadian Prime Minister Justin Trudeau said on Friday. Trudeau said China would only change its behavior if faced with a united front, adding he would raise the matter at a Group of Seven leaders’ summit next week. “The pressure on China right now from the international community … is significantly acute, particularly with the Winter Olympics coming up in China next year,” Trudeau told the Toronto Star in a video interview. “It would be easy for China … to shrug off what any one country, including just the United States alone, says. But when the global community comes together, that starts to shape their own calculations.” Canada, locked in a major diplomatic and trade dispute with China for more than two years, is one of the world’s leading winter sports …