Refresh .NET article: Determine installed versions of .NET Framework (#10513)

* Refresh .NET article: Determine installed versions of .NET Framework

* Edit fixes

* Fix links and tables

* Edits

* Reorg how versions are listed

* Formatting fixes

* Add direct link to table

* Add direct link to table

* Edits

* Edits

* Incorporate edit comments

* Incorporate additional review comments

Author: Dean Simpson