refs and cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -6,12 +6,12 @@
   <ItemGroup>
     <PackageVersion Include="Argon" Version="0.30.1" />
     <PackageVersion Include="Caseless.Fody" Version="1.9.1" />
-    <PackageVersion Include="EmptyFiles" Version="8.10.1" />
+    <PackageVersion Include="EmptyFiles" Version="8.11.0" />
     <PackageVersion Include="Fody" Version="6.9.2" />
     <PackageVersion Include="MarkdownSnippets.MsBuild" Version="28.0.0-beta.2" />
     <PackageVersion Include="Microsoft.Sbom.Targets" Version="4.0.3" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
-    <PackageVersion Include="Polyfill" Version="9.0.0-beta.2" />
+    <PackageVersion Include="Polyfill" Version="9.0.0-beta.9" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.156" />
     <PackageVersion Include="Resourcer.Fody" Version="1.8.1" />
     <PackageVersion Include="System.Collections.Immutable" Version="8.0.0" />