Apply suggestions from code review

Author: rmosolgo

lib/graphql/client.rb

@@ -380,12 +380,11 @@ def query(definition, variables: {}, context: {})
         error_payload = payload.merge(message: error["message"], error: error)
         ActiveSupport::Notifications.instrument("error.graphql", error_payload)
       end
- 
       Response.new(
         result,
         data: definition.new(data, Errors.new(errors, ["data"])),
         errors: Errors.new(errors),
-        extensions:,
+        extensions: extensions,
         full_response: execute.respond_to?("last_response") ? execute.last_response : nil
       )
     end