refs and cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -4,12 +4,12 @@
     <CentralPackageTransitivePinningEnabled>true</CentralPackageTransitivePinningEnabled>
   </PropertyGroup>
   <ItemGroup>
-    <PackageVersion Include="MarkdownSnippets.MsBuild" Version="28.0.2" />
+    <PackageVersion Include="MarkdownSnippets.MsBuild" Version="28.1.0" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
     <PackageVersion Include="OpenTelemetry" Version="1.15.2" />
     <PackageVersion Include="OpenTelemetry.Exporter.InMemory" Version="1.15.2" />
     <PackageVersion Include="Microsoft.Extensions.Logging" Version="10.0.5" />
-    <PackageVersion Include="Polyfill" Version="10.2.0" />
+    <PackageVersion Include="Polyfill" Version="10.3.0" />
     <PackageVersion Include="Verify" Version="31.15.0" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.1.2" />
     <PackageVersion Include="Verify.XunitV3" Version="31.15.0" />