Update Http.Async.cs
Update Http.Async.cs

Fixed indentation
RestSharp-resurrected/RestSharp,rivy/RestSharp,periface/RestSharp,jiangzm/RestSharp,benfo/RestSharp,huoxudong125/RestSharp,cnascimento/RestSharp,dmgandini/RestSharp,mattleibow/RestSharp,eamonwoortman/RestSharp.Unity,mattwalden/RestSharp,who/RestSharp,uQr/RestSharp,kouweizhong/RestSharp,PKRoma/RestSharp,lydonchandra/RestSharp,KraigM/RestSharp,haithemaraissia/RestSharp,amccarter/RestSharp,rucila/RestSharp,wparad/RestSharp,felipegtx/RestSharp,mwereda/RestSharp,dgreenbean/RestSharp,dyh333/RestSharp,chengxiaole/RestSharp,wparad/RestSharp,fmmendo/RestSharp,SaltyDH/RestSharp,restsharp/RestSharp