chore(deps): update xunit-dotnet monorepo to 2.9.3

Author: renovate[bot]

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

@@ -11,8 +11,8 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
-    <PackageReference Include="xunit" Version="2.9.2" />
-    <PackageReference Include="xunit.runner.console" Version="2.9.2" />
+    <PackageReference Include="xunit" Version="2.9.3" />
+    <PackageReference Include="xunit.runner.console" Version="2.9.3" />
     <PackageReference Include="Xunit.StaFact" Version="1.1.11" />
     <PackageReference Include="Microsoft.Reactive.Testing" Version="6.0.1" />
     <PackageReference Include="PublicApiGenerator" Version="11.3.0" />