Fix invalid syntax

scripts/Windows/OS/User/Install.ps1

@@ -6,10 +6,10 @@ function Install-PersonalUsers([Context] $context) {
     $userIDProperty = "User";
 
     $null = New-Module {
-        Get-UserID {
+        function Get-UserID {
             return $context.Get($userIDProperty);
         }
-        Set-UserID {
+        function Set-UserID {
             param([int]$value);
             $context.Set($userIDProperty, $value);
         }