Update dependency Verify.xunit to v31

Author: renovate[bot]

ArchUnitNETTests/ArchUnitNETTests.csproj

@@ -38,7 +38,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="Verify.xunit" Version="30.19.0" />
+    <PackageReference Include="Verify.xunit" Version="31.9.4" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.4" />
   </ItemGroup>