Open this photo in gallery: Ethann Isidore, from left, Harrison Ford and Phoebe Waller-Bridge in a scene from Indiana Jones and the Dial of Destiny. De-aging Ford for the film was costly, as was his shoulder injury.Lucasfilm Ltd./The Associated Press What a difference a few weekends can make. On July 20, the summer movie box office numbers were glum, down 7 per cent from last year, which itself was well below prepandemic levels. But as of the end of the month, this summer’s receipts are suddenly 8.5 per cent higher than last year’s – thanks to the unlikely trio of…