Raspberry Rhubarb Muffins

flour 1/2 tsp baking soda 4 tsp baking powder 1/2 tsp kosher salt 2 eggs 1 egg yolk 1 1/3 cups sugar 1/2 cup plus 2 Tbsp unsalted butter, melted 1 cup milk, at room temp 6 oz Greek yogurt, at room temp 2 tsp vanilla 1 cup raspberries 1 cup chopped rhubarb