Update UITT nuget.

Author: sarahelsaig

Lombiq.Walkthroughs.Test.UI/Lombiq.Walkthroughs.Tests.UI.csproj

@@ -21,7 +21,7 @@
   </ItemGroup>
 
   <ItemGroup Condition="'$(NuGetBuild)' == 'true'">
-    <PackageReference Include="Lombiq.Tests.UI" Version="12.1.1-13.0.1-alpha.5.osoe-1069" />
+    <PackageReference Include="Lombiq.Tests.UI" Version="12.1.1-13.0.1-alpha.6.osoe-1069" />
   </ItemGroup>
 
   <ItemGroup>