chore(deps): update dependency coverlet.msbuild to 6.0.4

Author: renovate[bot]

src/ReactiveUI.Validation.Tests/ReactiveUI.Validation.Tests.csproj

@@ -18,7 +18,7 @@
     <PackageReference Include="PublicApiGenerator" Version="11.3.0" />
     <PackageReference Include="Verify.Xunit" Version="28.1.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.0.0" />
-    <PackageReference Include="coverlet.msbuild" Version="6.0.2">
+    <PackageReference Include="coverlet.msbuild" Version="6.0.4">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>