[docs] [issue23125] Link to the nose project obsolete

[Roundup Robot]

Roundup Robot added the comment:

New changeset 88de50c1696b by Berker Peksag in branch '2.7':
Issue #23125: Update nose project page link.
https://hg.python.org/cpython/rev/88de50c1696b

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue23125>
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