[issue46475] Document use of NoReturn as a bottom type

[Jelle Zijlstra]

Change by Jelle Zijlstra <jelle.zijlstra at gmail.com>:


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components: +Library (Lib)
versions: +Python 3.10, Python 3.11, Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue46475>
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