MINOR: [C#] Bump coverlet.collector from 6.0.3 to 6.0.4 in /csharp (#45313)

Bumps [coverlet.collector](https://github.com/coverlet-coverage/coverlet) from 6.0.3 to 6.0.4.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/coverlet-coverage/coverlet/releases">coverlet.collector's releases</a>.</em></p>
<blockquote>
<h2>v6.0.4</h2>
<h3>Fixed</h3>
<ul>
<li>Fix empty coverage report when using include and exclude filters <a href="https://redirect.github.com/coverlet-coverage/coverlet/issues/1726">#1726</a></li>
</ul>
<p><a href="https://github.com/coverlet-coverage/coverlet/compare/v6.0.3...v6.0.4">Diff between 6.0.3 and 6.0.4</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/coverlet-coverage/coverlet/commit/2a6f949747eec763f7fc87e4eeea9b3b0d9d2b9b"><code>2a6f949</code></a> change log and vnext version number update</li>
<li><a href="https://github.com/coverlet-coverage/coverlet/commit/90b21079d43cffae3a18f264e00962b9c8a1d57a"><code>90b2107</code></a> update version info (<a href="https://redirect.github.com/coverlet-coverage/coverlet/issues/1731">#1731</a>)</li>
<li><a href="https://github.com/coverlet-coverage/coverlet/commit/4e95c9210c8f7ef70809d74ad6cbdd1d1edd8227"><code>4e95c92</code></a> Update changelog and back bump version (<a href="https://redirect.github.com/coverlet-coverage/coverlet/issues/1730">#1730</a>)</li>
<li><a href="https://github.com/coverlet-coverage/coverlet/commit/e3717da4a72a2a418cdb0bd9788600305eaae824"><code>e3717da</code></a> Exclude filter issue (<a href="https://redirect.github.com/coverlet-coverage/coverlet/issues/1728">#1728</a>)</li>
<li><a href="https://github.com/coverlet-coverage/coverlet/commit/8eecb425ac32b0863e30ca770fc0080a75c48d41"><code>8eecb42</code></a> update version and changelog (<a href="https://redirect.github.com/coverlet-coverage/coverlet/issues/1725">#1725</a>)</li>
<li>See full diff in <a href="https://github.com/coverlet-coverage/coverlet/compare/v6.0.3...v6.0.4">compare view</a></li>
</ul>
</details>
<br />

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Authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Signed-off-by: Curt Hagenlocher <[email protected]>

Author: dependabot[bot]

csharp/test/Apache.Arrow.Flight.Sql.Tests/Apache.Arrow.Flight.Sql.Tests.csproj

@@ -9,7 +9,7 @@
       <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
       <PackageReference Include="xunit" Version="2.9.3" />
       <PackageReference Include="xunit.runner.visualstudio" Version="3.0.1" />
-      <PackageReference Include="coverlet.collector" Version="6.0.3" />
+      <PackageReference Include="coverlet.collector" Version="6.0.4" />
     </ItemGroup>
 
     <ItemGroup>

csharp/test/Apache.Arrow.Flight.Tests/Apache.Arrow.Flight.Tests.csproj

@@ -9,7 +9,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.0.1" />
-    <PackageReference Include="coverlet.collector" Version="6.0.3" />
+    <PackageReference Include="coverlet.collector" Version="6.0.4" />
   </ItemGroup>
 
   <ItemGroup>