[docs] [issue32673] update tutorial dict part to reflect dict is ordered

[Xiang Zhang]

Xiang Zhang <angwerzx at 126.com> added the comment:

Thanks for reminding, Martin.

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resolution:  -> duplicate
stage: needs patch -> resolved
status: open -> closed
superseder:  -> Dict order is now guaranteed, so add tests and doc for it

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue32673>
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