Update docfx.json to add link to previous versions#3992

sdwheeler merged 1 commit intoMicrosoftDocs:mainMicrosoftDocs/windows-powershell-docs:mainfrom

sdwheeler:sdw-w429024-link-pvsdwheeler/windows-powershell-docs:sdw-w429024-link-pvCopy head branch name to clipboard