Upgrade Atata package to v2.9.0

Author: YevgeniyShunevych

test/Atata.Cli.HtmlValidate.IntegrationTests/Atata.Cli.HtmlValidate.IntegrationTests.csproj

@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Atata" Version="2.8.1" />
+    <PackageReference Include="Atata" Version="2.9.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
     <PackageReference Include="NUnit" Version="3.13.3" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />