Bump Verify.NUnit from 31.12.3 to 31.12.4

---
updated-dependencies:
- dependency-name: Verify.NUnit
  dependency-version: 31.12.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

src/Orc.Plot.Tests/Orc.Plot.Tests.csproj

@@ -26,7 +26,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="PublicApiGenerator" Version="11.5.4" PrivateAssets="all" />
-    <PackageReference Include="Verify.NUnit" Version="31.12.3" />
+    <PackageReference Include="Verify.NUnit" Version="31.12.4" />
   </ItemGroup>
 
   <ItemGroup>