Update dependency Soenneker.Tests.Unit to 3.0.921 (#1292)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

test/Soenneker.Extensions.LoggerConfiguration.ApplicationInsights.Tests/Soenneker.Extensions.LoggerConfiguration.ApplicationInsights.Tests.csproj

@@ -10,7 +10,7 @@
 
     <ItemGroup>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.0" />
-        <PackageReference Include="Soenneker.Tests.Unit" Version="3.0.920" />
+        <PackageReference Include="Soenneker.Tests.Unit" Version="3.0.921" />
         <PackageReference Include="coverlet.collector" Version="6.0.4">
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
             <PrivateAssets>all</PrivateAssets>