Bump Microsoft.CodeAnalysis.CSharp.Workspaces

Bumps [Microsoft.CodeAnalysis.CSharp.Workspaces](https://github.com/dotnet/roslyn) from 3.8.0-4.20475.2 to 3.8.0-4.20507.21.
- [Release notes](https://github.com/dotnet/roslyn/releases)
- [Changelog](https://github.com/dotnet/roslyn/blob/master/docs/Breaking%20API%20Changes.md)
- [Commits](https://github.com/dotnet/roslyn/commits)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

NetFabric.Hyperlinq.SourceGenerator/NetFabric.Hyperlinq.SourceGenerator.csproj

@@ -12,7 +12,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="3.8.0-4.20475.2" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="3.8.0-4.20507.21" PrivateAssets="all" />
     <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="3.3.0" PrivateAssets="all" />
   </ItemGroup>