[1.2.X] Fixed #14526 -- Updated wording regarding the minimum Python version...

[1.2.X] Fixed #14526 -- Updated wording regarding the minimum Python version required for GeoDjango. Thanks to PaulM for the report.

Backport of [14335] from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@14336 bcc190cf-cafb-0310-a4f2-bffc1f526a37