Fix default address of NuGet v3 stream
Fix default address of NuGet v3 stream

Just a quickfix, untested. See #2053 for details.
mrinaldi/Paket,0x53A/Paket,NatElkins/Paket,lexarchik/Paket,simonhdickson/Paket,artur-s/Paket,Thorium/Paket,jam40jeff/Paket,NatElkins/Paket,sergey-tihon/Paket,cloudRoutine/Paket,isaacabraham/Paket,mrinaldi/Paket,vbfox/Paket,0x53A/Paket,artur-s/Paket,lexarchik/Paket,Stift/Paket,Thorium/Paket,jam40jeff/Paket,baronfel/Paket,NatElkins/Paket,theimowski/Paket,inosik/Paket,cloudRoutine/Paket,lexarchik/Paket,lexarchik/Paket,snowcrazed/Paket,mrinaldi/Paket,simonhdickson/Paket,snowcrazed/Paket,Stift/Paket,cloudRoutine/Paket,inosik/Paket,isaacabraham/Paket,snowcrazed/Paket,fsprojects/Paket,fsprojects/Paket,thinkbeforecoding/Paket,isaacabraham/Paket,Thorium/Paket,0x53A/Paket,simonhdickson/Paket,thinkbeforecoding/Paket,mrinaldi/Paket,Thorium/Paket,vbfox/Paket,NatElkins/Paket,baronfel/Paket,snowcrazed/Paket,cloudRoutine/Paket,vbfox/Paket,0x53A/Paket,isaacabraham/Paket,thinkbeforecoding/Paket,vbfox/Paket,simonhdickson/Paket,theimowski/Paket,Stift/Paket,sergey-tihon/Paket,thinkbeforecoding/Paket,Stift/Paket