refs and cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -5,7 +5,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageVersion Include="LocalDb" Version="24.0.0" />
-    <PackageVersion Include="MarkdownSnippets.MsBuild" Version="28.0.2" />
+    <PackageVersion Include="MarkdownSnippets.MsBuild" Version="28.1.0" />
     <PackageVersion Include="Microsoft.Data.SqlClient" Version="7.0.0" />
     <PackageVersion Include="Microsoft.Extensions.DiagnosticAdapter" Version="3.1.32" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />