Update documentation

Signed-off-by: currantw <[email protected]>

docs/user/configuration_options.md

@@ -30,7 +30,7 @@
 | `HostnameVerification` | Whether certificate hostname verification should be performed for an SSL/TLS connection.                                                 | boolean | `0` or `1`                      | `1` (true)  |
 | `ResponseTimeout`      | The maximum time to wait for responses from the `Host`, in seconds.                                                                      | integer |                                 | `10`        |
 | `FetchSize`            | The page size for all cursor requests. The default value (-1) uses server-defined page size. Set FetchSize to 0 for non-cursor behavior. | integer | `-1`, `0` or any positive value | `-1`        |
-| `IsServerless`         | Whether the connection is to an OpenSearch Serverless cluster. The default value (-1) means it is determined by parsing the server URL.  | integer | `-1`, `0` or `1`                | `-1`        | 
+| `IsServerless`         | Whether the connection is to an OpenSearch Serverless cluster. If not specified, it is determined by parsing the server URL.             | boolean | `0` or `1`                      |             | 
 
 #### Logging Options