Bump the test-dependencies group with 1 update

Bumps Verify.NUnit from 31.0.5 to 31.4.1

---
updated-dependencies:
- dependency-name: Verify.NUnit
  dependency-version: 31.4.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: test-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

NGitLab.Mock.Tests/NGitLab.Mock.Tests.csproj

@@ -14,6 +14,6 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="NUnit3TestAdapter" Version="5.2.0" />
-    <PackageReference Include="Verify.NUnit" Version="31.0.5" />
+    <PackageReference Include="Verify.NUnit" Version="31.4.1" />
   </ItemGroup>
 </Project>