Bump Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing.XUnit (#1506)

Bumps [Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing.XUnit](https://github.com/dotnet/roslyn-sdk) from 1.1.2-beta1.23205.1 to 1.1.2-beta1.23251.2.
- [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]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Refit.Tests/Refit.Tests.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <Import Project="..\Refit\targets\refit.props" />
 
@@ -20,7 +20,7 @@
     <PackageReference Include="System.Reactive" Version="5.0.0" />    
     <PackageReference Include="Microsoft.AspNetCore.WebUtilities" Version="2.2.0" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.0.1" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing.XUnit" Version="1.1.2-beta1.23205.1" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing.XUnit" Version="1.1.2-beta1.23251.2" />
     <PackageReference Include="RichardSzalay.MockHttp" Version="6.0.0" />
     <ProjectReference Include="..\Refit.HttpClientFactory\Refit.HttpClientFactory.csproj" />
     <ProjectReference Include="..\Refit.Newtonsoft.Json\Refit.Newtonsoft.Json.csproj" />