make mypy 1.4.0 happy

seems like it was released today and produced one new error...

Signed-off-by: Andreas Lauser <andreas.lauser@mbition.io>
Signed-off-by: Gerrit Ecke <gerrit.ecke@mbition.io>

odxtools/structures.py

@@ -507,8 +507,8 @@ def __init__(self, *, response_type: str, **kwargs):  # "POS-RESPONSE" or "NEG-R
         self.response_type = response_type
 
     def encode(self, coded_request: Optional[ByteString] = None, **params) -> ByteString:
-        logger.info(f"Compose response message to the request {coded_request}")
         if coded_request is not None:
+            logger.info(f"Compose response message to the request {coded_request.hex()}")
             # Extract MATCHING-REQUEST-PARAMs from the coded request
             for param in self.parameters:
                 if param.parameter_type == "MATCHING-REQUEST-PARAM":