[docs] [issue33043] Add a 'Contributing to Docs' link at the bottom of docs.python.org

[Susan Su]

Change by Susan Su <susansu.software at gmail.com>:


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keywords: +patch
pull_requests: +12037
stage: needs patch -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33043>
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