Merge pull request #449 from SciSharp/dependabot/nuget/xunit-2.6.6

build(deps): bump xunit from 2.6.5 to 2.6.6

Author: martindevans

LLama.Unittest/LLama.Unittest.csproj

@@ -15,7 +15,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageReference Include="System.Linq.Async" Version="6.0.1" />
-    <PackageReference Include="xunit" Version="2.6.5" />
+    <PackageReference Include="xunit" Version="2.6.6" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.6">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>