correcció error group_code

app/crud.py

@@ -64,7 +64,7 @@ def start_invoices_oc(db):
     db.commit()
     return []
 
-def get_invoices_oc(db, id_billing_run, gropu_code):
+def get_invoices_oc(db, id_billing_run, group_code):
     registries = get_invoice_oc(db, id_billing_run, group_code)
     return registries