fix: Correct typo

Co-authored-by: Joris Conijn <[email protected]>

Author: Michael Brewer

aws_lambda_powertools/utilities/data_classes/cognito_user_pool_event.py

@@ -599,7 +599,7 @@ def session(self) -> List[ChallengeResult]:
 
     @property
     def client_metadata(self) -> Optional[Dict[str, str]]:
-        """OOne or more key-value pairs that you can provide as custom input to the Lambda function that you specify
+        """One or more key-value pairs that you can provide as custom input to the Lambda function that you specify
         for the define auth challenge trigger."""
         return self["request"].get("clientMetadata")