update replace script.

scripts/ReplaceNugetCache.sh

@@ -1,8 +1,8 @@
  #!/usr/bin/env bash
  
- cp ../samples/ControlCatalog.NetCore/bin/Debug/netcoreapp2.0/Avalonia**.dll ~/.nuget/packages/avalonia/$1/lib/netcoreapp2.0/
- cp ../samples/ControlCatalog.NetCore/bin/Debug/netcoreapp2.0/Avalonia**.dll ~/.nuget/packages/avalonia/$1/lib/netstandard2.0/
- cp ../samples/ControlCatalog.NetCore/bin/Debug/netcoreapp2.0/Avalonia**.dll ~/.nuget/packages/avalonia.skia/$1/lib/netstandard2.0/
- cp ../samples/ControlCatalog.NetCore/bin/Debug/netcoreapp2.0/Avalonia**.dll ~/.nuget/packages/avalonia.native/$1/lib/netstandard2.0/
+ cp ../samples/ControlCatalog.NetCore/bin/Debug/netcoreapp3.1/Avalonia**.dll ~/.nuget/packages/avalonia/$1/lib/netcoreapp3.1/
+ cp ../samples/ControlCatalog.NetCore/bin/Debug/netcoreapp3.1/Avalonia**.dll ~/.nuget/packages/avalonia/$1/lib/netstandard2.0/
+ cp ../samples/ControlCatalog.NetCore/bin/Debug/netcoreapp3.1/Avalonia**.dll ~/.nuget/packages/avalonia.skia/$1/lib/netstandard2.0/
+ cp ../samples/ControlCatalog.NetCore/bin/Debug/netcoreapp3.1/Avalonia**.dll ~/.nuget/packages/avalonia.native/$1/lib/netstandard2.0/