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

[Xiang Zhang]

New submission from Xiang Zhang <angwerzx at 126.com>:

Ordered builtin dict is the rule in 3.7, the tutorial part about dict[1] needs updating.

[1] https://docs.python.org/3.7/tutorial/datastructures.html#dictionaries

----------
assignee: docs at python
components: Documentation
messages: 310737
nosy: docs at python, xiang.zhang
priority: normal
severity: normal
stage: needs patch
status: open
title: update tutorial dict part to reflect dict is ordered
versions: Python 3.7

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