revert visibility timeout change as it's already the max (#3305)

Author: johnduffell

handlers/product-move-api/cfn.yaml

@@ -380,7 +380,7 @@ Resources:
   RefundQueue:
     Type: AWS::SQS::Queue
     Properties:
-      VisibilityTimeout: 86400 # 24 hours
+      VisibilityTimeout: 43200 # 12 hours
       MessageRetentionPeriod: 865800 # 10 days +30 minutes
       QueueName:
         Fn::Sub: product-switch-refund-${Stage}