MINOR: [C#] Bump xunit from 2.5.2 to 2.5.3 in /csharp (apache#38410)

Bumps [xunit](https://github.com/xunit/xunit) from 2.5.2 to 2.5.3.
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/xunit/xunit/commit/161ce40d656a92fe3dda826a98c742310c7c55a1"><code>161ce40</code></a> v2.5.3</li>
<li><a href="https://github.com/xunit/xunit/commit/b8bfb82f89ea697d7b5c7961100b61bc0bd82ff6"><code>b8bfb82</code></a> <a href="https://redirect.github.com/xunit/xunit/issues/2795">#2795</a>: Collection equality regression with custom comparer on sequence type (...</li>
<li><a href="https://github.com/xunit/xunit/commit/644d65e557a398317d54b6228abf2b79b887c12d"><code>644d65e</code></a> Use <code>is null</code> and <code>is not null</code> in assertion tests</li>
<li><a href="https://github.com/xunit/xunit/commit/2457cf147e0dca6e34a15a43ada9298201005b93"><code>2457cf1</code></a> Bump up to v2.5.3-pre</li>
<li>See full diff in <a href="https://github.com/xunit/xunit/compare/2.5.2...2.5.3">compare view</a></li>
</ul>
</details>
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Authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
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csharp/test/Apache.Arrow.Compression.Tests/Apache.Arrow.Compression.Tests.csproj

@@ -8,7 +8,7 @@
 
   <ItemGroup>
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+    <PackageReference Include="xunit" Version="2.5.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3" />
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csharp/test/Apache.Arrow.Flight.Sql.Tests/Apache.Arrow.Flight.Sql.Tests.csproj

@@ -7,7 +7,7 @@
 
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       <PackageReference Include="coverlet.collector" Version="6.0.0" />
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csharp/test/Apache.Arrow.Flight.Tests/Apache.Arrow.Flight.Tests.csproj

@@ -7,7 +7,7 @@
 
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     <PackageReference Include="coverlet.collector" Version="6.0.0" />
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csharp/test/Apache.Arrow.Tests/Apache.Arrow.Tests.csproj

@@ -15,7 +15,7 @@
 
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