[docs] [issue18187] Fix broken link in Doc/library/venv.rst

[Ned Deily]

Ned Deily added the comment:

Thanks for the patch!

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nosy: +ned.deily
resolution:  -> fixed
stage:  -> committed/rejected
status: open -> closed

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18187>
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