Install winget only if necessary

scripts/Windows/OS/Install.ps1

@@ -32,7 +32,10 @@ function Invoke-WindowsInstallation([Context] $context)
 
     if (-not $context.Get("SoftwarePrerequisitesInstalled")) {
         Write-Host "Installing prerequisites for installing software";
+
+        if (-not $(Get-Command winget)) {
             choco install -y winget;
+        }
 
         Install-Module -AcceptLicense -Force "NuGet";
         Import-Module NuGet;