Bump Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing.XUnit

Bumps [Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing.XUnit](https://github.com/dotnet/roslyn-sdk) from 1.1.2-beta1.23251.2 to 1.1.2-beta1.23431.1.
- [Release notes](https://github.com/dotnet/roslyn-sdk/releases)
- [Commits](https://github.com/dotnet/roslyn-sdk/commits)

---
updated-dependencies:
- dependency-name: Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing.XUnit
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Refit.Tests/Refit.Tests.csproj

@@ -20,7 +20,7 @@
     <PackageReference Include="System.Reactive" Version="6.0.0" />    
     <PackageReference Include="Microsoft.AspNetCore.WebUtilities" Version="2.2.0" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.6.0" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing.XUnit" Version="1.1.2-beta1.23251.2" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing.XUnit" Version="1.1.2-beta1.23431.1" />
     <PackageReference Include="RichardSzalay.MockHttp" Version="6.0.0" />
     <ProjectReference Include="..\Refit.HttpClientFactory\Refit.HttpClientFactory.csproj" />
     <ProjectReference Include="..\Refit.Newtonsoft.Json\Refit.Newtonsoft.Json.csproj" />