Bump xunit from 2.5.0 to 2.5.1 (#1522)

Bumps [xunit](https://github.com/xunit/xunit) from 2.5.0 to 2.5.1.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/xunit/xunit/commit/9dc851b5e642ec7929da1ac06d59988d0a2d840b"><code>9dc851b</code></a>
v2.5.1</li>
<li><a
href="https://github.com/xunit/xunit/commit/86b0eef9ef286661a7f804ec16575396325ca458"><code>86b0eef</code></a>
<a href="https://redirect.github.com/xunit/xunit/issues/2770">#2770</a>:
Make SerializationHelper public</li>
<li><a
href="https://github.com/xunit/xunit/commit/f49dafc318e93a105d78704b8a6734c966ae1418"><code>f49dafc</code></a>
File re-sort for SerializationHelper &amp; XunitSerializationInfo</li>
<li><a
href="https://github.com/xunit/xunit/commit/d0004ae78d9b0fafa0a6fc046af50bb912d1581e"><code>d0004ae</code></a>
<a href="https://redirect.github.com/xunit/xunit/issues/2773">#2773</a>:
Add Assert.RaisesAny and Assert.RaisesAnyAsync non-generic for
EventAr...</li>
<li><a
href="https://github.com/xunit/xunit/commit/c1dba28cf0929d6602168ab4a081ca6a536323f0"><code>c1dba28</code></a>
Latest assertions</li>
<li><a
href="https://github.com/xunit/xunit/commit/b7c828ebf130cf3d768ef6b3effcb38fe15690d3"><code>b7c828e</code></a>
Move .editorconfig up into contentFiles</li>
<li><a
href="https://github.com/xunit/xunit/commit/08e74e76b884f29f2e9d9f93e8fcf8bda39982de"><code>08e74e7</code></a>
Add .editorconfig to assert source NuGet package to indicate generated
code (...</li>
<li><a
href="https://github.com/xunit/xunit/commit/79f411aabe2e74ab00fe2ecbd9f237bc85af792b"><code>79f411a</code></a>
<a href="https://redirect.github.com/xunit/xunit/issues/2767">#2767</a>:
Verify types match when comparing FileSystemInfo values (v2)</li>
<li><a
href="https://github.com/xunit/xunit/commit/9c28f584e0cf5a714b03433eaa7e19c3d3c40ddb"><code>9c28f58</code></a>
Latest dependencies</li>
<li><a
href="https://github.com/xunit/xunit/commit/63dce4f197f79306c47eef96323be56c081b08f8"><code>63dce4f</code></a>
<a href="https://redirect.github.com/xunit/xunit/issues/2767">#2767</a>:
Special case FileSystemInfo objects by just comparing the FullName in
...</li>
<li>Additional commits viewable in <a
href="https://github.com/xunit/xunit/compare/2.5.0...2.5.1">compare
view</a></li>
</ul>
</details>
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ImperatorToCK3.UnitTests/ImperatorToCK3.UnitTests.csproj

@@ -18,7 +18,7 @@
     </PackageReference>
     <PackageReference Include="FluentAssertions" Version="6.12.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-    <PackageReference Include="xunit" Version="2.5.0" />
+    <PackageReference Include="xunit" Version="2.5.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.0">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>