Update C# protobuf reference to 3.20.1
<PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="3.1.16" />
<PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="All" />
<PackageReference Include="OneOf" Version="3.0.216" />
- <PackageReference Include="Pulumi.Protobuf" Version="3.13.0" />
+ <PackageReference Include="Pulumi.Protobuf" Version="3.20.1" />
<PackageReference Include="semver" Version="2.1.0" />
<PackageReference Include="Serilog.Extensions.Logging" Version="3.0.1" />
<PackageReference Include="Serilog.Sinks.Console" Version="4.0.1" />
