American spelling in two comments

serialize, in a code comment and a test comment; the receipt's fulfillment
status values stay as the wire contract spells them.

Author: vvillait88

agentscore_commerce/challenge/body.py

@@ -102,7 +102,7 @@ def build_402_body(
     if agent_memory is not None:
         # AgentMemoryHint is a dataclass; merchants pass it directly via
         # first_encounter_agent_memory(...). Convert here so JSONResponse /
-        # json.dumps can serialise without per-merchant boilerplate.
+        # json.dumps can serialize without per-merchant boilerplate.
         body["agent_memory"] = (
             asdict(agent_memory) if is_dataclass(agent_memory) and not isinstance(agent_memory, type) else agent_memory
         )

tests/test_checkout.py

@@ -331,7 +331,7 @@ class _Verified:
 
     async def settle_payment(self, _payload: Any, _requirement: Any) -> Any:
         # ProcessX402Settle treats a falsy success as a settle_failed phase via the
-        # exception raised by settle_result_to_json_bytes when it tries to serialise
+        # exception raised by settle_result_to_json_bytes when it tries to serialize
         # an empty dict, so we shape the response as a plain JSON-serializable dict.
         if not self.settle_success:
             raise RuntimeError("settle rejected")