fix: remove () from type name in tests (#70)

Tests are failing on pwsh 7.4 because it stopped accepting `'System.Collections.ArrayList()'` as an argument to `New-Object`.

Removing the extra parentheses should fix the issue.

test/FeatureFlags.Tests.ps1

@@ -604,9 +604,9 @@ Describe 'Get-EvaluatedFeatureFlags' -Tag Features {
 Describe 'Out-EvaluatedFeaturesFiles' -Tag Features {
  Context 'Verify output file content' {
  BeforeAll {
- $global:featuresJsonContent = New-Object 'System.Collections.ArrayList()'
- $global:featuresIniContent = New-Object 'System.Collections.ArrayList()'
- $global:featuresEnvConfigContent = New-Object 'System.Collections.ArrayList()'
+ $global:featuresJsonContent = New-Object 'System.Collections.ArrayList'
+ $global:featuresIniContent = New-Object 'System.Collections.ArrayList'
+ $global:featuresEnvConfigContent = New-Object 'System.Collections.ArrayList'
 
  $serializedConfig = Get-Content -Raw "$PSScriptRoot\multiple-stages-features.json"
  Confirm-FeatureFlagConfig $serializedConfig