Fix doc string

Author: iola-arj

src/peppol_py/sender.py

@@ -131,12 +131,10 @@ def send_peppol_document(
 
     ``keyfile`` (str): the path to the private key of the sender.
 
-    ``password`` (str): the password for the private key of the sender.
+    ``keyfile_password`` (str): the password for the private key of the sender.
 
     ``certfile`` (str): the path to the public key of the sender.
 
-    ``service_provider_id`` (bool): identifier of the sending service provider.
-
     ``sender_id`` (str): optional sender id, will be extracted from document if not specified.
 
     ``receiver_id`` (str): optional receiver id, will be extracted from document if not specified.