Bump Microsoft.AspNetCore.TestHost in /test/Timingz.Tests

Bumps [Microsoft.AspNetCore.TestHost](https://github.com/dotnet/aspnetcore) from 5.0.4 to 5.0.6.
- [Release notes](https://github.com/dotnet/aspnetcore/releases)
- [Commits](dotnet/aspnetcore@v5.0.4...v5.0.6)

Signed-off-by: dependabot[bot] <support@github.com>

test/Timingz.Tests/Timingz.Tests.csproj

@@ -11,7 +11,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="FluentAssertions" Version="5.10.3" />
-    <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="5.0.4" />
+    <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="5.0.6" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.4" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">