Update config docs

Signed-off-by: Andy Grove <andygrove@nvidia.com>

docs/configs.md

@@ -65,6 +65,7 @@ Name | Description | Default Value
 <a name="sql.castStringToFloat.enabled"></a>spark.rapids.sql.castStringToFloat.enabled|When set to true, enables casting from strings to float types (float, double) on the GPU. Currently hex values aren't supported on the GPU. Also note that casting from string to float types on the GPU returns incorrect results when the string represents any number "1.7976931348623158E308" <= x < "1.7976931348623159E308" and "-1.7976931348623158E308" >= x > "-1.7976931348623159E308" in both these cases the GPU returns Double.MaxValue while CPU returns "+Infinity" and "-Infinity" respectively|false
 <a name="sql.castStringToTimestamp.enabled"></a>spark.rapids.sql.castStringToTimestamp.enabled|When set to true, casting from string to timestamp is supported on the GPU. The GPU only supports a subset of formats when casting strings to timestamps. Refer to the CAST documentation for more details.|false
 <a name="sql.concurrentGpuTasks"></a>spark.rapids.sql.concurrentGpuTasks|Set the number of tasks that can execute concurrently per GPU. Tasks may temporarily block when the number of concurrent tasks in the executor exceeds this amount. Allowing too many concurrent tasks on the same GPU may lead to GPU out of memory errors.|1
+<a name="sql.createMap.enabled"></a>spark.rapids.sql.createMap.enabled|When set to true, support the CreateMap expression on the GPU with multiple key-value pairs. The GPU version does not detect duplicate keys or make any guarantees about which key wins if there are duplicates. CreateMap is always supported on the GPUwhen there is a single key-value pair.|false
 <a name="sql.csv.read.bool.enabled"></a>spark.rapids.sql.csv.read.bool.enabled|Parsing an invalid CSV boolean value produces true instead of null|false
 <a name="sql.csv.read.byte.enabled"></a>spark.rapids.sql.csv.read.byte.enabled|Parsing CSV bytes is much more lenient and will return 0 for some malformed values instead of null|false
 <a name="sql.csv.read.date.enabled"></a>spark.rapids.sql.csv.read.date.enabled|Parsing invalid CSV dates produces different results from Spark|false