Bump MicrosoftCodeAnalysisTestingVersion (#1781)

Bumps `MicrosoftCodeAnalysisTestingVersion` from 1.1.2-beta1.24074.2 to 1.1.2-beta1.24121.1.

Updates `Microsoft.CodeAnalysis.CSharp.CodeFix.Testing.XUnit` from 1.1.2-beta1.24074.2 to 1.1.2-beta1.24121.1
- [Release notes](https://github.com/dotnet/roslyn-sdk/releases)
- [Commits](https://github.com/dotnet/roslyn-sdk/commits)

Updates `Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing.XUnit` from 1.1.2-beta1.24074.2 to 1.1.2-beta1.24121.1
- [Release notes](https://github.com/dotnet/roslyn-sdk/releases)
- [Commits](https://github.com/dotnet/roslyn-sdk/commits)

Updates `Microsoft.CodeAnalysis.VisualBasic.CodeFix.Testing.XUnit` from 1.1.2-beta1.24074.2 to 1.1.2-beta1.24121.1
- [Release notes](https://github.com/dotnet/roslyn-sdk/releases)
- [Commits](https://github.com/dotnet/roslyn-sdk/commits)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Directory.Packages.props

@@ -10,7 +10,7 @@
     <!-- https://learn.microsoft.com/en-us/visualstudio/extensibility/roslyn-version-support?view=vs-2022 -->
     <MicrosoftCodeAnalysisVersion>4.8.0</MicrosoftCodeAnalysisVersion>
     <MicrosoftCodeAnalysisVersion Condition="'$(IsAnalyzerProject)'=='true'">4.3.0</MicrosoftCodeAnalysisVersion>
-    <MicrosoftCodeAnalysisTestingVersion>1.1.2-beta1.24074.2</MicrosoftCodeAnalysisTestingVersion>
+    <MicrosoftCodeAnalysisTestingVersion>1.1.2-beta1.24121.1</MicrosoftCodeAnalysisTestingVersion>
   </PropertyGroup>
   <ItemGroup>
     <PackageVersion Include="BenchmarkDotNet.Diagnostics.Windows" Version="$(BenchmarkDotNetVersion)" />