documentation: update to include new batch_get_record api call (#2476)

* Update to include new batch_get_record api call

New `batch_get_record` api call.

* Update amazon_sagemaker_featurestore.rst

Co-authored-by: icywang86rui <[email protected]>

Author: paul-cb

doc/amazon_sagemaker_featurestore.rst

@@ -291,6 +291,13 @@ example identifier to retrieve the record.
    record_identifier_value = str(2990130)
    featurestore_runtime.get_record(FeatureGroupName=transaction_feature_group_name, RecordIdentifierValueAsString=record_identifier_value)
 
+You can use the ``batch_get_record`` function to retrieve multiple records simultaneously from your feature store. The following example uses this API to retrieve a batch of records.
+
+.. code:: python
+
+   record_identifier_values = ["573291", "109382", "828400", "124013"]
+   featurestore_runtime.batch_get_record(Identifiers=[{"FeatureGroupName": transaction_feature_group_name, "RecordIdentifiersValueAsString": record_identifier_values}])
+
 An example response from the fraud detection example:
 
 .. code:: python