I got the following when installing the templates...
➜ ~ dotnet new --install Orleans.Contrib.UniversalSilo.Templates
Determining projects to restore...
/usr/local/share/dotnet/sdk/5.0.100/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.EolTargetFrameworks.targets(28,5):
(warning NETSDK1138: The target framework 'netcoreapp1.0' is out of support and will not receive security updates in the
future. Please refer to https://aka.ms/dotnet-core-support for more information about the support policy.
[/Users/redacted/.templateengine/dotnetcli/v5.0.100/scratch/restore.csproj]
Restored /Users/redacted/.templateengine/dotnetcli/v5.0.100/scratch/restore.csproj (in 2.06 sec).
I got the following when installing the templates...