Example Package Arguments are incorrect.

The information in the README.md for disabling telemetry with --install-arguments='"DISABLE_TELEMETRY"' is incorrect, it should be instead passed via --install-arguments='"POWERSHELL_TELEMETRY_OPTOUT=1"' as per the article linked in the same block: https://devblogs.microsoft.com/powershell/new-telemetry-in-powershell-7-preview-3/#how-to-disable