facture: fix Facture.save signature to comply with Django

eo_gestion/eo_facture/models.py

@@ -281,10 +281,10 @@ class Facture(models.Model):
             return self.code()
         return self.pk
 
-    def save(self):
+    def save(self, *args, **kwargs):
         if self.ordre is None and not self.proforma:
             self.ordre = self.last_ordre_plus_one()
-        super().save()
+        super().save(*args, **kwargs)
 
     def clean(self):
         if not (self.contrat or self.client):