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?

從 content/tutorial/tutorial.md 開始，結合 jumpTo 閱讀教學中的 render 函式，以確認變數命名不一致的問題。檢查連結的 CodePen，以確定它是否也屬於所要求的文件變更。完成的標準是教學使用一致的名稱，且相關範例對初學者而言仍然容易理解。