Edit React Native Docs

[chiaramooney]

Update React Native for Windows doc to include up-to-date information on Visual Studio version.

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@chiaramooney : Thanks for your contribution! The author(s) have been notified to review your proposed change.

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Learn Build status updates of commit 96722a7:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
hub/dev-environment/javascript/react-native-for-windows.md	:white_check_mark:Succeeded

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