Buffalo Chicken Taco Ring

Name: Buffalo Chicken Taco Ring
Ingredients: Nonstick cooking spray, for the pan; 2 cups shredded rotisserie chicken; 4 ounces cream cheese, cut into pieces, at room temperature; 1/2 cup Buffalo-style hot sauce, plus more for serving; 2 scallions, thinly sliced, white and green parts separated; 10 flat-bottomed hard taco shells; 2 1/2 cups shredded mozzarella (about 10 ounces); 10 deli slices mild Cheddar (about 5 ounces); 1/4 cup fresh cilantro leaves; 2 medium carrots, shredded on the large holes of a box grater; 1 large stalk celery, thinly sliced, plus 1/4 cup celery leaves; Juice of 1/2 lime; Kosher salt and freshly ground black pepper; Ranch dressing, for serving