Update website doc for data_cache_config (#15177)

Co-authored-by: Sarthak Tandon <[email protected]>

Author: skysarthak

mmv1/third_party/terraform/website/docs/r/sql_database_instance.html.markdown

@@ -421,7 +421,7 @@ The optional `settings.active_directory_config` subblock supports:
 
 The optional `settings.data_cache_config` subblock supports:
 
-* `data_cache_enabled` - (Optional) Whether data cache is enabled for the instance. Defaults to `false`. Can be used with MYSQL and PostgreSQL only.
+* `data_cache_enabled` - (Optional) Whether data cache is enabled for the instance. Defaults to `true` for MYSQL Enterprise Plus and PostgreSQL Enterprise Plus instances only. For SQL Server Enterprise Plus instances it defaults to `false`.
 
 The optional `settings.deny_maintenance_period` subblock supports: