Updated package title

Co-authored-by: Michael Hawker MSFT (XAML Llama) <24302614+michael-hawker@users.noreply.github.com>

Author: Sergio0694

Microsoft.Toolkit.Mvvm/Microsoft.Toolkit.Mvvm.csproj

@@ -4,7 +4,7 @@
     <TargetFrameworks>netstandard2.0;netstandard2.1</TargetFrameworks>
     <LangVersion>8.0</LangVersion>
     <Nullable>enable</Nullable>
-    <Title>Windows Community Toolkit MVVM .NET Standard</Title>
+    <Title>Windows Community Toolkit MVVM Toolkit</Title>
     <Description>
       This package includes a .NET Standard MVVM library with helpers such as:
       - ObservableObject: a base class for objects implementing the INotifyPropertyChanged interface.