Update dependency Verify.NUnit to 31.9.0

Author: renovate-bot

src/Directory.Packages.props

@@ -20,6 +20,6 @@
     <PackageVersion Include="NUnit" Version="4.4.0" />
     <PackageVersion Include="NUnit.Analyzers" Version="4.11.2" />
     <PackageVersion Include="NUnit3TestAdapter" Version="6.0.0" />
-    <PackageVersion Include="Verify.NUnit" Version="31.8.0" />
+    <PackageVersion Include="Verify.NUnit" Version="31.9.0" />
   </ItemGroup>
 </Project>