refs and cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -14,6 +14,6 @@
     <PackageVersion Include="NUnit" Version="4.4.0" />
     <PackageVersion Include="Verify.NUnit" Version="30.7.3" />
     <PackageVersion Include="NUnit3TestAdapter" Version="5.1.0" />
-    <PackageVersion Include="Microsoft.Sbom.Targets" Version="4.1.0" />
+    <PackageVersion Include="Microsoft.Sbom.Targets" Version="4.1.1" />
   </ItemGroup>
 </Project>