[SITE] Document cache.expiration-interval-ms in Spark Configuration

site/docs/spark-configuration.md

@@ -60,6 +60,7 @@ Both catalogs are configured using properties nested under the catalog name. Com
 | spark.sql.catalog._catalog-name_.uri               | thrift://host:port            | Metastore connect URI; default from `hive-site.xml` |
 | spark.sql.catalog._catalog-name_.warehouse         | hdfs://nn:8020/warehouse/path | Base path for the warehouse directory |
 | spark.sql.catalog._catalog-name_.cache-enabled     | `true` or `false`             | Whether to enable catalog cache, default value is `true` |
+| spark.sql.catalog._catalog-name_.cache.expiration-interval-ms | `30000` (30 seconds) | Duration after which cached catalog entries are expired; Only effective if `cache-enabled` is `true`. `-1` disables cache expiration and `0` disables caching entirely, irrespective of `cache-enabled`. Default is `30000` (30 seconds) ||                                                    |                               |                                                          |
 
 Additional properties can be found in common [catalog configuration](./configuration.md#catalog-properties).