A Minnesota law went into effect Friday legalizing edibles containing small amounts of THC, the component in cannabis that provides a high, apparently surprising some Republicans, at least one of whom said he voted for the provision unknowingly. The law permits the sale of edibles and beverages containing up to 5 milligrams of hemp-derived THC per serving. Most edibles in states where recreational cannabis is fully legalized contain 10 milligrams per serving. The bill’s author,…