Update Thread.Name documentation

[eduardo-vp]

The Name property can now be renamed (doesn't throw an exception anymore). Based on the changes here dotnet/runtime#47084

Fixes dotnet/runtime#85635

[eduardo-vp]

I removed the code samples. However I'm not sure if the property can now be considered simple enough for this or if it should still have a sample code

[learn-build-service-prod]

Learn Build status updates of commit 3021b26:

✅ Validation status: passed

File	Status	Preview URL	Details
snippets/cpp/VS_Snippets_CLR_System/system.Threading.Thread.Name/CPP/source.cpp	✅Succeeded	n/a (file deleted or renamed)
snippets/csharp/System.Threading/Thread/Name/Project.csproj	✅Succeeded	n/a (file deleted or renamed)
snippets/csharp/System.Threading/Thread/Name/source.cs	✅Succeeded	n/a (file deleted or renamed)
snippets/fsharp/System.Threading/Thread/Name/fs.fsproj	✅Succeeded	n/a (file deleted or renamed)
snippets/fsharp/System.Threading/Thread/Name/source.fs	✅Succeeded	n/a (file deleted or renamed)
snippets/visualbasic/VS_Snippets_CLR_System/system.Threading.Thread.Name/VB/source.vb	✅Succeeded	n/a (file deleted or renamed)
xml/System.Threading/Thread.xml	✅Succeeded	View

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[gewarren]

Thanks @eduardo-vp!