Add a missing space

Author: Espand-Masoon

docs/relational-databases/indexes/create-clustered-indexes.md

@@ -80,7 +80,7 @@ monikerRange: "=azuresqldb-current||>=sql-server-2016||>=sql-server-linux-2017||
 
 4.  Under **Index key columns**, click **Add...**.  
 
-5.  In the **Select Columns from**_table\_name_ dialog box, select the check box of the table column to be added to the clustered index.  
+5.  In the **Select Columns from** _table\_name_ dialog box, select the check box of the table column to be added to the clustered index.  
 
 6.  Click **OK**.