Bump CommunityToolkit.Mvvm from 8.2.0 to 8.4.0#21

dependabot[bot] wants to merge 1 commit intomainastar-development/astar-dev:mainfrom

dependabot/nuget/src/services/AStar.Dev.OneDrive.Client/CommunityToolkit.Mvvm-8.4.0astar-development/astar-dev:dependabot/nuget/src/services/AStar.Dev.OneDrive.Client/CommunityToolkit.Mvvm-8.4.0Copy head branch name to clipboard