chore(deps): update dependency verify.nunit to 31.1.0

Author: renovate[bot]

src/Directory.Packages.props

@@ -38,7 +38,7 @@
     <PackageVersion Include="Microsoft.Reactive.Testing" Version="6.1.0" />
     <PackageVersion Include="PublicApiGenerator" Version="11.5.0" />
     <PackageVersion Include="coverlet.msbuild" Version="6.0.4" />
-    <PackageVersion Include="Verify.NUnit" Version="31.0.4" />
+    <PackageVersion Include="Verify.NUnit" Version="31.1.0" />
     <PackageVersion Include="Verify.SourceGenerators" Version="2.5.0" />
     <PackageVersion Include="ReactiveMarbles.SourceGenerator.TestNuGetHelper" Version="1.3.1" />
     <PackageVersion Include="Basic.Reference.Assemblies.Net80" Version="1.8.3" />