Donut tread on me! Health Secretary Robert F. Kennedy Jr. is demanding Dunkin’ prove whether its sugary caffeinated drinks are safe to drink — and Massachusetts lovers of the orange and pink aren’t having it. Even the Masshole in Chief, Gov. Maura Healey, waded in, daring the Health and Human Services bigwig to “Come and take it” in a cheeky X post after Kennedy made the announcement at a Texas rally last week. “We’re going to ask Dunkin’ Donuts and Starbucks, ‘Show us the safety data that show