Add the yogurt, mayonnaise, basil, dill, parsley, chives, garlic, lemon zest, juice, vinegar, 1 teaspoon kosher salt and 1/4 teaspoon freshly ground black pepper to a blender. Puree until smooth, scraping down the sides with a rubber spatula as needed. Season with salt and pepper to taste. Refrigerate in an airtight container for up to 5 days; stir well before using.