Bumped MVVM Toolkit to latest CI package

samples/MvvmSampleUwp/MvvmSampleUwp/MvvmSampleUwp.csproj

@@ -266,7 +266,7 @@
       <Version>7.0.0-preview3</Version>
     </PackageReference>
     <PackageReference Include="Microsoft.Toolkit.Mvvm">
-      <Version>7.0.0-build.280.g34b749dfb9</Version>
+      <Version>7.0.0-build.486</Version>
     </PackageReference>
     <PackageReference Include="Microsoft.Toolkit.Uwp.UI.Controls">
       <Version>7.0.0-preview2</Version>

samples/MvvmSampleUwp/NuGet.config

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <configuration>
     <packageSources>
-        <add key="WindowsCommunityToolkit-PRs" value="https://pkgs.dev.azure.com/dotnet/WindowsCommunityToolkit/_packaging/WindowsCommunityToolkit-PullRequests/nuget/v3/index.json" />
+        <add key="WindowsCommunityToolkit-CI" value="https://pkgs.dev.azure.com/dotnet/WindowsCommunityToolkit/_packaging/WindowsCommunityToolkit-MainLatest/nuget/v3/index.json" />
     </packageSources>
 </configuration>