Update README.md

Author: quertenmont

README.md

@@ -26,7 +26,7 @@ simple model field taking it's value from a postgres sequence.  This is an easy
 ---
 
 ## Installation
--   Run `pip install sequence-field`
+-   Run `pip install django-sequencefield`
 -   Use a (Small/Big)IntegerSequenceField in one of your model
 -   Add a SequenceConstraint into the same model to name the sequence field to use and which id should take values from this sequence constraint