[QA] Fix wrong spec files path in QA::Scenario::Test::Instance

Signed-off-by: Rémy Coutable <remy@rymai.me>

qa/qa/scenario/test/instance.rb

@@ -26,7 +26,7 @@ module QA
               if rspec_options.any?
                 rspec_options
               else
-                ::File.expand_path('../specs/features', __dir__)
+                ::File.expand_path('../../specs/features', __dir__)
               end
           end
         end