chore(deps): update dependency verify.nunit to 31.0.4 (#4194)

This PR contains the following updates:

| Package | Change | Age | Confidence |
|---|---|---|---|
| [Verify.NUnit](https://redirect.github.com/VerifyTests/Verify) |
`31.0.3` -> `31.0.4` |
[![age](https://developer.mend.io/api/mc/badges/age/nuget/Verify.NUnit/31.0.4?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/nuget/Verify.NUnit/31.0.3/31.0.4?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>VerifyTests/Verify (Verify.NUnit)</summary>

###
[`v31.0.4`](https://redirect.github.com/VerifyTests/Verify/compare/31.0.3...31.0.4)

[Compare
Source](https://redirect.github.com/VerifyTests/Verify/compare/31.0.3...31.0.4)

</details>

---

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src/Directory.Packages.props

@@ -44,7 +44,7 @@
     <PackageVersion Include="System.IO.FileSystem.Primitives" Version="4.3.0" />
     <PackageVersion Include="System.Runtime.Serialization.Primitives" Version="4.3.0" />
     <PackageVersion Include="System.Text.Json" Version="9.0.10" />
-    <PackageVersion Include="Verify.NUnit" Version="31.0.3" />
+    <PackageVersion Include="Verify.NUnit" Version="31.0.4" />
     <PackageVersion Include="Microsoft.Windows.CsWinRT" Version="2.3.0-prerelease.251015.2" />
     <PackageVersion Include="Microsoft.AspNetCore.Components" Version="$(AspNetVersion)" />
     <PackageVersion Include="Microsoft.Maui.Controls" Version="$(MauiVersion)" />