Windows 10 build 21362

Windows 10 build 21362 is an unleaked build of Cobalt. [https://github.com/microsoft/microsoft-ui-xaml/commit/9a74d1633bcc8ae4e486ba59af1337c777003693 by a Microsoft employee on 19 April 2021. It was later showcased in the session "What's new in Windows 10 for ALL developers" at the Microsoft Build 2021 digital event.