AppVeyor: disable download progress on choco installs
AppVeyor: disable download progress on choco installs

Downloading packages is quite noisy in the logs. This patch disables
the download progress output, which should save +/- 4000 lines of
output.

Signed-off-by: Sebastiaan van Stijn <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@gone.nl>

dmcgowan/containerd,containerd/containerd,mikebrow/containerd,estesp/containerd,dmcgowan/containerd,estesp/containerd,containerd/containerd,vdemeester/containerd,thaJeztah/containerd,vdemeester/containerd,crosbymichael/containerd,mikebrow/containerd,thaJeztah/containerd,crosbymichael/containerd