chore(deps): update dependency xunit.stafact to v2

Author: renovate[bot]

src/ReactiveUI.Validation.Tests/ReactiveUI.Validation.Tests.csproj

@@ -13,7 +13,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.console" Version="2.9.3" />
-    <PackageReference Include="Xunit.StaFact" Version="1.2.69" />
+    <PackageReference Include="Xunit.StaFact" Version="2.0.44" />
     <PackageReference Include="Microsoft.Reactive.Testing" Version="6.0.1" />
     <PackageReference Include="PublicApiGenerator" Version="11.4.5" />
     <PackageReference Include="Verify.Xunit" Version="28.16.0" />