test: bump to Safari 15 for Sauce Labs (#4274)
test: bump to Safari 15 for Sauce Labs (#4274)


jnizet/ng-bootstrap,fbasso/ng-bootstrap,ng-bootstrap/ng-bootstrap,jnizet/ng-bootstrap,ng-bootstrap/ng-bootstrap,fbasso/ng-bootstrap,fbasso/ng-bootstrap,fbasso/ng-bootstrap,jnizet/ng-bootstrap,ng-bootstrap/ng-bootstrap,jnizet/ng-bootstrap,ng-bootstrap/ng-bootstrap