⬆️ Update 🥅 .NET Package xunit to 2.9.1 (#157)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [xunit](https://redirect.github.com/xunit/xunit) | `2.9.0` -> `2.9.1`
|
[![age](https://developer.mend.io/api/mc/badges/age/nuget/xunit/2.9.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/nuget/xunit/2.9.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/nuget/xunit/2.9.0/2.9.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/nuget/xunit/2.9.0/2.9.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>xunit/xunit (xunit)</summary>

###
[`v2.9.1`](https://redirect.github.com/xunit/xunit/compare/2.9.0...2.9.1)

[Compare
Source](https://redirect.github.com/xunit/xunit/compare/2.9.0...2.9.1)

</details>

---

### Configuration

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rebase/retry checkbox.

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---

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---

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Directory.Packages.props

@@ -9,7 +9,7 @@
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0" developmentDependency="true" />
     <PackageVersion Include="coverlet.collector" Version="6.0.2" developmentDependency="true" />
     <PackageVersion Include="coverlet.msbuild" Version="6.0.2" developmentDependency="true" />
-    <PackageVersion Include="xunit" Version="2.9.0" developmentDependency="true" />
+    <PackageVersion Include="xunit" Version="2.9.1" developmentDependency="true" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.2" developmentDependency="true" />
   </ItemGroup>
 </Project>