Triple-Chocolate Cranberry Oatmeal Cookies

• 1 cup all purpose flour
• 1/2 teaspoon baking soda
• 1/2 teaspoon cinnamon
• 1/4 teaspoon salt
• 10 tablespoons (1 1/4 sticks) unsalted butter, room temperature
• 1/2 cup sugar
• 1/2 cup (packed) golden brown sugar
• 1 large egg
• 1 teaspoon vanilla extract
• 1 cup old-fashioned oats
• 1/2 cup semisweet chocolate chips
• 1/2 cup milk chocolate chips
• 1/2 cup white chocolate chips
• 1/2 cup coarsely chopped fresh or frozen cranberries

• 2 ounces milk chocolate or white chocolate, chopped (for drizzling)