added workload group catalog view

Author: julieMSFT

articles/synapse-analytics/sql-data-warehouse/sql-data-warehouse-reference-tsql-system-views.md

@@ -40,6 +40,7 @@ Links to the documentation for T-SQL statements supported in Synapse SQL pool.
 * [sys.pdw_table_mappings](/sql/relational-databases/system-catalog-views/sys-pdw-table-mappings-transact-sql?toc=/azure/synapse-analytics/sql-data-warehouse/toc.json&bc=/azure/synapse-analytics/sql-data-warehouse/breadcrumb/toc.json&view=azure-sqldw-latest)
 * [sys.workload_management_workload_classifier_details](/sql/relational-databases/system-catalog-views/sys-workload-management-workload-classifier-details-transact-sql?toc=/azure/synapse-analytics/sql-data-warehouse/toc.json&bc=/azure/synapse-analytics/sql-data-warehouse/breadcrumb/toc.json&view=azure-sqldw-latest)
 * [sys.workload_management_workload_classifiers](/sql/relational-databases/system-catalog-views/sys-workload-management-workload-classifiers-transact-sql?toc=/azure/synapse-analytics/sql-data-warehouse/toc.json&bc=/azure/synapse-analytics/sql-data-warehouse/breadcrumb/toc.json&view=azure-sqldw-latest)
+* [sys.workload_management_workload_groups](/sql/relational-databases/system-catalog-views/sys-workload-management-workload-groups-transact-sql?toc=/azure/synapse-analytics/sql-data-warehouse/toc.json&bc=/azure/synapse-analytics/sql-data-warehouse/breadcrumb/toc.json&view=azure-sqldw-latest)
 
 ## SQL Data Warehouse dynamic management views (DMVs)