feat: index param in async search

_search-plugins/async/index.md

@@ -31,6 +31,7 @@ Options | Description | Default value | Required
 `wait_for_completion_timeout` |  The amount of time that you plan to wait for the results. You can see whatever results you get within this time just like in a normal search. You can poll the remaining results based on an ID. The maximum value is 300 seconds. | 1 second | No
 `keep_on_completion` |  Whether you want to save the results in the cluster after the search is complete. You can examine the stored results at a later time. | `false` | No
 `keep_alive` |  The amount of time that the result is saved in the cluster. For example, `2d` means that the results are stored in the cluster for 48 hours. The saved search results are deleted after this period or if the search is canceled. Note that this includes the query execution time. If the query overruns this time, the process cancels this query automatically. | 12 hours | No
+`index` | The name of the index to be searched, or a comma-separated list or wildcard expression of index names. | searches on all cluster indexes | No
 
 #### Example request
 

_security/access-control/users-roles.md

@@ -29,7 +29,7 @@ OpenSearch Dashboards provides a user-friendly interface for managing roles. Rol
 ### Editing the `roles.yml` file
 
 If you want more granular control of your security configuration, you can edit roles and their associated permissions in the `roles.yml` file. This method provides direct access to the underlying configuration and can be version controlled for use in collaborative development environments.
-For more information about creating roles, see the [Create roles][https://opensearch.org/docs/latest/security/access-control/users-roles/#create-roles) documentation.
+For more information about creating roles, see the [Create roles](https://opensearch.org/docs/latest/security/access-control/users-roles/#create-roles) documentation.
 
 Unless you need to create new [reserved or hidden users]({{site.url}}{{site.baseurl}}/security/access-control/api/#reserved-and-hidden-resources), we **highly** recommend using OpenSearch Dashboards or the REST API to create new users, roles, and role mappings. The `.yml` files are for initial setup, not ongoing use.
 {: .warning }