fix: Update feature_group.py ingest() description (aws#3615)

* Update feature_group.py ingest() description

Updating ingest function description (https://sagemaker.readthedocs.io/en/stable/api/prep_data/feature_store.html#sagemaker.feature_store.feature_group.FeatureGroup.ingest) according to discussion in a thread (https://amzn-aws.slack.com/archives/C02FT61K4BV/p1661876115110819).

* documentation: get rid of white spaces

Author: mwfongAWS

src/sagemaker/feature_store/feature_group.py

@@ -708,20 +708,25 @@ def ingest(
     ) -> IngestionManagerPandas:
         """Ingest the content of a pandas DataFrame to feature store.
 
-        ``max_worker`` number of thread will be created to work on different partitions of
-        the ``data_frame`` in parallel.
+        ``max_worker`` the number of threads created to work on different partitions of the
+        ``data_frame`` in parallel.
 
-        ``max_processes`` number of processes will be created to work on different partitions
-        of the ``data_frame`` in parallel, each with ``max_worker`` threads.
+        ``max_processes`` the number of processes will be created to work on different
+        partitions of the ``data_frame`` in parallel, each with ``max_worker`` threads.
 
-        The ingest function will attempt to ingest all records in the data frame. If ``wait``
-        is True, then an exception is thrown after all records have been processed. If ``wait``
-        is False, then a later call to the returned instance IngestionManagerPandas' ``wait()``
-        function will throw an exception.
+        The ingest function attempts to ingest all records in the data frame. SageMaker
+        Feature Store throws an exception if it fails to ingest any records.
 
-        Zero based indices of rows that failed to be ingested can be found in the exception.
-        They can also be found from the IngestionManagerPandas' ``failed_rows`` function after
-        the exception is thrown.
+        If ``wait`` is ``True``, Feature Store runs the ``ingest`` function synchronously.
+        You receive an ``IngestionError`` if there are any records that can't be ingested.
+        If ``wait`` is ``False``, Feature Store runs the ``ingest`` function asynchronously.
+
+        Instead of setting ``wait`` to ``True`` in the ``ingest`` function, you can invoke
+        the ``wait`` function on the returned instance of ``IngestionManagerPandas`` to run
+        the ``ingest`` function synchronously.
+
+        To access the rows that failed to ingest, set ``wait`` to ``False``. The
+        ``IngestionError.failed_rows`` object saves all of the rows that failed to ingest.
 
         `profile_name` argument is an optional one. It will use the default credential if None is
         passed. This `profile_name` is used in the sagemaker_featurestore_runtime client only. See