Merge pull request #607 from boxed/patch-1

README spelling fix

Author: j-antunes

README.rst

@@ -86,7 +86,7 @@ Install using ``pip``\ ...
     $ pip install django-polymorphic
 
 
-At the moment we have an unnofical version (4.0.0a). While we wait to gain access to pip. If you want to use the latest version (which works for Django >4.0.0). You can install it using
+At the moment we have an unoffical version (4.0.0a). While we wait to gain access to pip. If you want to use the latest version (which works for Django >4.0.0). You can install it using
 
 .. code:: bash