Probability condition tests are flaky

[lupino3]

 Context Probability condition
      [+] Always allows with probability 1 125ms
      [-] Always rejects with probability 0 219ms
        Expected $false, but got $true.
        472:             Test-FeatureFlag "not-launched" "storage-important/master" $config | Should -Be $false
        at <ScriptBlock>, D:\a\1\s\test\FeatureFlags.Tests.ps1: line 472

Those tests sometimes fail.

[lupino3]

Working build: https://dev.azure.com/PowerShell-FeatureFlags/PowerShell-FeatureFlags/_build/results?buildId=51&view=results
Broken build: https://dev.azure.com/PowerShell-FeatureFlags/PowerShell-FeatureFlags/_build/results?buildId=50&view=results

Same commit ID.