Disconnect-vRAServer still references Global variable in comments

[jonathanmedd]

Disconnect-vRAServer still references Global variable in comments:

• PowervRA/src/Functions/Public/Disconnect-vRAServer.ps1

  Line 7 in 949f9e0

  Disconnect from a vRA server by removing the authorization token and the global vRAConnection variable from PowerShell

• PowervRA/src/Functions/Public/Disconnect-vRAServer.ps1

  Line 46 in 949f9e0

  Write-Verbose -Message "Removing vRAConnection global variable"

Needs to be amended to Script variable