Update Directory.Packages.props

Author: SimonCropp

src/Directory.Packages.props

@@ -13,6 +13,6 @@
     <PackageVersion Include="Ulid" Version="1.3.4" />
     <PackageVersion Include="Verify" Version="28.9.0" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.1.2" />
-    <PackageVersion Include="Verify.NUnit" Version="28.8.1" />
+    <PackageVersion Include="Verify.NUnit" Version="28.9.0" />
   </ItemGroup>
 </Project>