chore: update configs.md (apache#2428)

Author: mbutrovich

docs/source/user-guide/latest/configs.md

@@ -88,6 +88,6 @@ Comet provides the following configuration settings.
 | spark.comet.scan.preFetch.threadNum | The number of threads running pre-fetching for CometScan. Effective if spark.comet.scan.preFetch.enabled is enabled. Note that more pre-fetching threads means more memory requirement to store pre-fetched row groups. | 2 |
 | spark.comet.shuffle.preferDictionary.ratio | The ratio of total values to distinct values in a string column to decide whether to prefer dictionary encoding when shuffling the column. If the ratio is higher than this config, dictionary encoding will be used on shuffling string column. This config is effective if it is higher than 1.0. Note that this config is only used when `spark.comet.exec.shuffle.mode` is `jvm`. | 10.0 |
 | spark.comet.shuffle.sizeInBytesMultiplier | Comet reports smaller sizes for shuffle due to using Arrow's columnar memory format and this can result in Spark choosing a different join strategy due to the estimated size of the exchange being smaller. Comet will multiple sizeInBytes by this amount to avoid regressions in join strategy. | 1.0 |
-| spark.comet.sparkToColumnar.supportedOperatorList | A comma-separated list of operators that will be converted to Arrow columnar format when 'spark.comet.sparkToColumnar.enabled' is true | Range,InMemoryTableScan |
+| spark.comet.sparkToColumnar.supportedOperatorList | A comma-separated list of operators that will be converted to Arrow columnar format when 'spark.comet.sparkToColumnar.enabled' is true | Range,InMemoryTableScan,RDDScan |
 | spark.hadoop.fs.comet.libhdfs.schemes | Defines filesystem schemes (e.g., hdfs, webhdfs) that the native side accesses via libhdfs, separated by commas. Valid only when built with hdfs feature enabled. | |
 <!--END:CONFIG_TABLE-->