docs(event_sources): fix DynamoDB stream event docstring (#2468)

Author: abbasyadollahi

Diff for: aws_lambda_powertools/utilities/data_classes/common.py

@@ -16,7 +16,7 @@ def __init__(self, data: Dict[str, Any], json_deserializer: Optional[Callable] =
         data : Dict[str, Any]
             Lambda Event Source Event payload
         json_deserializer : Callable, optional
-            function to deserialize `str`, `bytes`, bytearray` containing a JSON document to a Python `obj`,
+            function to deserialize `str`, `bytes`, `bytearray` containing a JSON document to a Python `obj`,
             by default json.loads
         """
         self._data = data

Diff for: aws_lambda_powertools/utilities/data_classes/dynamo_db_stream_event.py

@@ -39,7 +39,7 @@ def deserialize(self, value: Dict) -> Any:
             --------                                ------
             {'NULL': True}                          None
             {'BOOL': True/False}                    True/False
-            {'N': str(value)}                       str(value)
+            {'N': Decimal(value)}                   Decimal(value)
             {'S': string}                           string
             {'B': bytes}                            bytes
             {'NS': [str(value)]}                    set([str(value)])