Update dependency Verify.NUnit to 31.28.0

Author: dependencyupdates[bot]

src/Directory.Packages.props

@@ -94,7 +94,7 @@
     <PackageVersion Include="System.Reflection.MetadataLoadContext" Version="$(RuntimeFrameworkVersion)" />
     <PackageVersion Include="System.ServiceProcess.ServiceController" Version="$(RuntimeFrameworkVersion)" />
     <PackageVersion Include="Validar.Fody" Version="1.9.0" />
-    <PackageVersion Include="Verify.NUnit" Version="31.20.0" />
+    <PackageVersion Include="Verify.NUnit" Version="31.28.0" />
     <PackageVersion Include="Yarp.ReverseProxy" Version="2.3.0" />
   </ItemGroup>
   <ItemGroup Label="Versions to pin transitive references">