docs: Fix docstring typo (feast-dev#3431)

fix docstring typo

Author: loftiskg

sdk/python/feast/data_source.py

@@ -57,7 +57,7 @@ def from_proto(cls, kafka_options_proto: DataSourceProto.KafkaOptions):
             kafka_options_proto: A protobuf representation of a DataSource
 
         Returns:
-            Returns a BigQueryOptions object based on the kafka_options protobuf
+            Returns a KafkaOptions object based on the kafka_options protobuf
         """
         watermark_delay_threshold = None
         if kafka_options_proto.HasField("watermark_delay_threshold"):