Update XamlBehaviors to 3.0.0

[Sergio0694]

Fixes

Updates the XamlBehaviors package.

PR Type

What kind of change does this PR introduce?

• Build or CI related changes

[Arlodotexe]

Current CI error is:

         D:\a\Windows\Windows\tooling\ProjectHeads\AllComponents\Uwp\CommunityToolkit.App.Uwp.csproj : error NU1605: Warning As Error: Detected package downgrade: Microsoft.Xaml.Behaviors.Uwp.Managed from 3.0.0 to 3.0.0-preview2. Reference the package directly from the project to select a different version.  [D:\a\Windows\Windows\CommunityToolkit.AllComponents.sln]
       D:\a\Windows\Windows\tooling\ProjectHeads\AllComponents\Uwp\CommunityToolkit.App.Uwp.csproj : error NU1605:  CommunityToolkit.App.Uwp -> CommunityToolkit.Uwp.Behaviors -> Microsoft.Xaml.Behaviors.Uwp.Managed (>= 3.0.0)  [D:\a\Windows\Windows\CommunityToolkit.AllComponents.sln]
       D:\a\Windows\Windows\tooling\ProjectHeads\AllComponents\Uwp\CommunityToolkit.App.Uwp.csproj : error NU1605:  CommunityToolkit.App.Uwp -> Microsoft.Xaml.Behaviors.Uwp.Managed (>= 3.0.0-preview2) [D:\a\Windows\Windows\CommunityToolkit.AllComponents.sln]

Seems not all references to preview2 were updated.