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

[hai shi]

hai shi <shihai1991 at 126.com> added the comment:

hi, everyone. I am a freshman,so let me do it from easy issues:)

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nosy: +shihai1991

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