I can't build icerpc-csharp after upgrading to the latest .NET 9 preview on macos:
dotnet build -nr:false -c Debug
/Users/bernard/builds/icerpc-csharp/tests/IceRpc.Extensions.DependencyInjection.Tests/IceRpc.Extensions.DependencyInjection.Tests.csproj : error NU1903: Warning As Error: Package 'System.Text.Json' 8.0.0 has a known high severity vulnerability, https://github.com/advisories/GHSA-hh2w-p6rv-4g7w
/Users/bernard/builds/icerpc-csharp/tests/IceRpc.Deadline.Tests/IceRpc.Deadline.Tests.csproj : error NU1903: Warning As Error: Package 'System.Text.Json' 8.0.0 has a known high severity vulnerability, https://github.com/advisories/GHSA-hh2w-p6rv-4g7w
/Users/bernard/builds/icerpc-csharp/tests/IceRpc.Quic.Tests/IceRpc.Quic.Tests.csproj : error NU1903: Warning As Error: Package 'System.Text.Json' 8.0.0 has a known high severity vulnerability, https://github.com/advisories/GHSA-hh2w-p6rv-4g7w
/Users/bernard/builds/icerpc-csharp/tests/IceRpc.Slice.Tests/IceRpc.Slice.Tests.csproj : error NU1903: Warning As Error: Package 'System.Text.Json' 8.0.0 has a known high severity vulnerability, https://github.com/advisories/GHSA-hh2w-p6rv-4g7w
/Users/bernard/builds/icerpc-csharp/tests/IceRpc.Conformance.Tests/IceRpc.Conformance.Tests.csproj : error NU1903: Warning As Error: Package 'System.Text.Json' 8.0.0 has a known high severity vulnerability, https://github.com/advisories/GHSA-hh2w-p6rv-4g7w
/Users/bernard/builds/icerpc-csharp/tests/IceRpc.Tests/IceRpc.Tests.csproj : error NU1903: Warning As Error: Package 'System.Text.Json' 8.0.0 has a known high severity vulnerability, https://github.com/advisories/GHSA-hh2w-p6rv-4g7w
/Users/bernard/builds/icerpc-csharp/tests/IceRpc.RequestContext.Tests/IceRpc.RequestContext.Tests.csproj : error NU1903: Warning As Error: Package 'System.Text.Json' 8.0.0 has a known high severity vulnerability, https://github.com/advisories/GHSA-hh2w-p6rv-4g7w
...
I can't build icerpc-csharp after upgrading to the latest .NET 9 preview on macos:
Related to #4020, but not for CI.