Add documentation for indices.replication.max_bytes_per_sec

_install-and-configure/configuring-opensearch/index-settings.md

@@ -35,6 +35,8 @@ OpenSearch supports the following cluster-level index settings. All settings in
 
 - `indices.recovery.max_concurrent_remote_store_streams` (Integer): The number of streams to the remote repository that can be opened in parallel when recovering a remote store index. Default is `20`. 
 
+- `indices.replication.max_bytes_per_sec` (String): Limits the total inbound and outbound replication traffic for each node. If a value is not specified in the configured value the `indices.recovery.max_bytes_per_sec` setting is used, which defaults to 40 mb. If you set the replication traffic value to less than or equal to 0 mb, rate limiting is disabled, which causes replication data to be transferred at the highest possible rate.
+
 - `indices.fielddata.cache.size` (String): The maximum size of the field data cache. May be specified as an absolute value (for example, `8GB`) or a percentage of the node heap (for example, `50%`). This value is static so you must specify it in the `opensearch.yml` file. If you don't specify this setting, the maximum size is unlimited. This value should be smaller than the `indices.breaker.fielddata.limit`. For more information, see [Field data circuit breaker]({{site.url}}{{site.baseurl}}/install-and-configure/configuring-opensearch/circuit-breaker/#field-data-circuit-breaker-settings).
 
 ## Index-level index settings