Windows 11 build 22549 (rs prerelease)

Windows 11 build 22549 (rs_prerelease) is a build of Nickel, the 22H2 development semester of Windows as a service. It was mentioned on several occasions:
 * A screenshot posted in the announcement page of build 22557.
 * An issue posted to the GitHub repository for Windows Terminal on 11 February 2022.
 * The "New Development Containers for SharePoint Framework (SPFx) Samples" demo session posted to YouTube by Microsoft 365 Community on 9 March 2022.