Fixed #8211 -- Corrected a misspelt word in docs/add_ons.txt. Thanks Piotr...

Fixed #8211 -- Corrected a misspelt word in docs/add_ons.txt. Thanks Piotr Lewandowski for catching this.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8290 bcc190cf-cafb-0310-a4f2-bffc1f526a37