[docs] [issue35525] Incorrect keyword name in NNTP.starttls() documentation

[miss-islington]

Change by miss-islington <mariatta.wijaya+miss-islington at gmail.com>:


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pull_requests: +10817, 10818, 10819, 10820

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35525>
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