refs and cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -8,7 +8,7 @@
     <PackageVersion Include="Caseless.Fody" Version="1.9.1" />
     <PackageVersion Include="EmptyFiles" Version="8.14.0" />
     <PackageVersion Include="Fody" Version="6.9.3" />
-    <PackageVersion Include="MarkdownSnippets.MsBuild" Version="28.0.0-beta.2" />
+    <PackageVersion Include="MarkdownSnippets.MsBuild" Version="28.0.0-beta.5" />
     <PackageVersion Include="Microsoft.Sbom.Targets" Version="4.1.2" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.0.0" />
     <PackageVersion Include="Polyfill" Version="9.0.0-beta.9" />