chore(deps): update dependency verify.nunit to 31.7.3 (#4208)

This PR contains the following updates:

| Package | Change |
[Age](https://docs.renovatebot.com/merge-confidence/) |
[Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [Verify.NUnit](https://redirect.github.com/VerifyTests/Verify) |
`31.7.1` -> `31.7.3` |
![age](https://developer.mend.io/api/mc/badges/age/nuget/Verify.NUnit/31.7.3?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/nuget/Verify.NUnit/31.7.1/31.7.3?slim=true)
|

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### Release Notes

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

###
[`v31.7.3`](https://redirect.github.com/VerifyTests/Verify/compare/31.7.2...31.7.3)

[Compare
Source](https://redirect.github.com/VerifyTests/Verify/compare/31.7.2...31.7.3)

###
[`v31.7.2`](https://redirect.github.com/VerifyTests/Verify/compare/31.7.1...31.7.2)

[Compare
Source](https://redirect.github.com/VerifyTests/Verify/compare/31.7.1...31.7.2)

</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="9.0.11" />
-    <PackageVersion Include="Verify.NUnit" Version="31.7.1" />
+    <PackageVersion Include="Verify.NUnit" Version="31.7.3" />
     <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)" />