cartads_cs: use proper connector slug in notification URL (#36260)

passerelle/apps/cartads_cs/models.py

@@ -656,7 +656,7 @@ class AbstractCartaDSCS(BaseResource):
         signer = Signer(salt='cart@ds_cs/dossier')
         dossier.notification_url = request.build_absolute_uri(
                 reverse('generic-endpoint', kwargs={
-                    'connector': 'cartads-cs',
+                    'connector': self.get_connector_slug(),
                     'slug': self.slug,
                     'endpoint': 'notification'})) + '/%s/' % signer.sign(str(dossier.id))
         dossier.save()