chore(deps): update dependency verify.nunit to 31.8.0 (#465)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

src/Directory.Packages.props

@@ -14,7 +14,7 @@
     <PackageVersion Include="NUnit" Version="4.4.0" />
 	<PackageVersion Include="NUnit3TestAdapter" Version="5.2.0" />
 	<PackageVersion Include="NUnit.Analyzers" Version="4.11.2" />
-    <PackageVersion Include="Verify.NUnit" Version="31.7.3" />
+    <PackageVersion Include="Verify.NUnit" Version="31.8.0" />
     <PackageVersion Include="PublicApiGenerator" Version="11.5.3" />
     <PackageVersion Include="coverlet.msbuild" Version="6.0.4" />
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0" />