Update docs for new clause count setting

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

@@ -39,6 +39,8 @@ OpenSearch supports the following cluster-level index settings. All settings in
 
 - `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).
 
+- `indices.query.bool.max_clause_count` (Integer): Defines the maximum product of fields and terms queryable at once. Before OpenSearch 2.16, this static setting required a cluster restart to apply. Now dynamic, existing search thread pools may use the old static value initially, causing `TooManyClauses` exceptions. New thread pools use the updated value. Default is 1024.
+
 - `cluster.remote_store.index.path.type` (String): The path strategy for the data stored in the remote store. This setting is effective only for remote-store-enabled clusters. This setting supports the following values:
   - `fixed`: Stores the data in path structure `<repository_base_path>/<index_uuid>/<shard_id>/`.
   - `hashed_prefix`: Stores the data in path structure `hash(<shard-data-idenitifer>)/<repository_base_path>/<index_uuid>/<shard_id>/`.