[docs] [issue35616] Change references to '4.0'.

[Emmanuel Arias]

Change by Emmanuel Arias <emmanuelarias30 at gmail.com>:


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keywords: +patch, patch
pull_requests: +10688, 10689
stage: needs patch -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35616>
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