Fix typo

coin/configuration/models.py

@@ -13,7 +13,7 @@ from coin.resources.models import IPSubnet
 """
 Implementation note : Configuration is a PolymorphicModel.
 The childs of Configuration are the differents models to store
-technical informations of a subscibtion.
+technical informations of a subscription.
 
 To add a new configuration backend, you have to create a new app with a model
 which inherit from Configuration.