Variable naming inconsistency in the tutorial documentation

Hi,
I have just used the React tutorial, it is great!
It helps a lot to learn the basic.

While working, I have spotted a small inconsistency on https://github.com/reactjs/reactjs.org/blob/main/content/tutorial/tutorial.md

When creating the buttons to move into the history, we are using a move variable that we are sending to jumpTo:

But jumpTo use step to make the moves:

I suggest that we switch the move and step variables of the render function to make the tutorial more understandable by beginners:

I can push a merge request for the documentation but I do not know how to change the source code linked by @gaearon on codepen:
https://codepen.io/gaearon/pen/gWWZgR?editors=0010

Is there a way to do that?

从 content/tutorial/tutorial.md 开始，结合 jumpTo 阅读教程中的 render 函数，以确认变量命名不一致的问题。检查链接的 CodePen，以确定它是否也属于所请求的文档变更。完成的标准是教程使用一致的名称，并且相关示例对初学者来说仍然易于理解。