typo - Get-ComputerInfo biosseralnumber - please fix typo

[coolbreeze822]

Steps to reproduce

>Get-ComputerInfo biosserialnumber

Expected behavior

BiosSerialNumber
---------------
xx9di43

Actual behavior

Environment data

> $PSVersionTable
PSVersion                      5.1.17763.1007
PSEdition                      Desktop
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   10.0.17763.1007
CLRVersion                     4.0.30319.42000
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1

[sdwheeler]

FYI - this is fixed in PowerShell 6 and higher. Not sure about the chances of getting it fixed in PowerShell 5.1.