[docs] [issue33071] Document that PyPI no longer requires 'register'

[Cheryl Sabella]

Change by Cheryl Sabella <cheryl.sabella at gmail.com>:


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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed
versions: +Python 3.7, Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33071>
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