[docs] [issue18176] Builtins documentation refers to old version of UCD.

[Serhiy Storchaka]

Changes by Serhiy Storchaka <storchaka at gmail.com>:


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components: +Documentation, Unicode
nosy: +ezio.melotti

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18176>
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