Add missing comma (#60)

Author: mshafrir-stripe

web.rb

@@ -75,7 +75,7 @@ def log_info(message)
         payload = Sinatra::IndifferentHash[JSON.parse(request.body.read)]
     end
     begin
-        payment_intent = Stripe::PaymentIntent.confirm(payload[:payment_intent_id] {:use_stripe_sdk => true})
+        payment_intent = Stripe::PaymentIntent.confirm(payload[:payment_intent_id], {:use_stripe_sdk => true})
         rescue Stripe::StripeError => e
         status 402
         return log_info("Error: #{e.message}")