[release/9.0.1xx-sr5] Update CommunityToolkit.Maui & Mvvm reference in template

[github-actions]

Backport of #28510 to release/9.0.1xx-sr5

/cc @PureWeen @jfversluis

[PureWeen]

/azp run

[azure-pipelines]

Azure Pipelines could not run because the pipeline triggers exclude this branch/path.

[rmarinho]

This is failing some tests with

C:\a\_work\_temp\test-dir\packages\microsoft.maui.core\9.0.50\buildTransitive\Microsoft.Maui.Core.After.targets(30,5): error MA003: The current .NET MAUI package version '9.0.50' requires the .NET MAUI workload version to be at least '9.0.0'. The current .NET MAUI workload version is '8.0.100'. [C:\a\_work\_temp\test-dir\InstallPackages344702020\InstallPackages344702020.csproj::TargetFramework=net8.0-windows10.0.19041.0]
C:\a\_work\_temp\test-dir\packages\microsoft.maui.core\9.0.50\buildTransitive\Microsoft.Maui.Core.After.targets(30,5): error MA003: The current .NET MAUI package version '9.0.50' requires the .NET MAUI workload version to be at least '9.0.0'. The current .NET MAUI workload version is '8.0.100'. [C:\a\_work\_temp\test-dir\InstallPackages344702020\InstallPackages344702020.csproj::TargetFramework=net8.0-ios]
C:\a\_work\_temp\test-dir\packages\microsoft.maui.core\9.0.50\buildTransitive\Microsoft.Maui.Core.After.targets(30,5): error MA003: The current .NET MAUI package version '9.0.50' requires the .NET MAUI workload version to be at least '9.0.0'. The current .NET MAUI workload version is '8.0.100'. [C:\a\_work\_temp\test-dir\InstallPackages344702020\InstallPackages344702020.csproj::TargetFramework=net8.0-maccatalyst]
C:\a\_work\_temp\test-dir\packages\microsoft.maui.core\9.0.50\buildTransitive\Microsoft.Maui.Core.After.targets(30,5): error MA003: The current .NET MAUI package version '9.0.50' requires the .NET MAUI workload version to be at least '9.0.0'. The current .NET MAUI workload version is '8.0.100'. [C:\a\_work\_temp\test-dir\InstallPackages344702020\InstallPackages344702020.csproj::TargetFramework=net8.0-android]
    0 Warning(s)
    4 Error(s)
Time Elapsed 00:00:03.28