refs or cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -6,12 +6,12 @@
   <ItemGroup>
     <PackageVersion Include="FluentValidation" Version="12.1.1" />
     <PackageVersion Include="MarkdownSnippets.MsBuild" Version="28.0.0" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
     <PackageVersion Include="Microsoft.Sbom.Targets" Version="4.1.5" />
     <PackageVersion Include="NUnit" Version="4.5.0" />
     <PackageVersion Include="NUnit3TestAdapter" Version="6.1.0" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.172" />
-    <PackageVersion Include="Polyfill" Version="9.10.0" />
+    <PackageVersion Include="Polyfill" Version="9.12.0" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.1.2" />
     <PackageVersion Include="Verify.NUnit" Version="31.13.2" />
     <PackageVersion Include="Argon" Version="0.33.5" />