Update how-to-setup-rbac.md

Author: seesharprun

articles/cosmos-db/how-to-setup-rbac.md

@@ -100,6 +100,9 @@ The actual metadata requests allowed by the `Microsoft.DocumentDB/databaseAccoun
 
 Azure Cosmos DB exposes two built-in role definitions:
 
+> [!IMPORTANT]
+> The term **role definitions** here refer to Azure Cosmos DB specific role definitions. These are distinct from Azure role-based access control role definitions.
+
 | ID | Name | Included actions |
 |---|---|---|
 | 00000000-0000-0000-0000-000000000001 | Cosmos DB Built-in Data Reader | `Microsoft.DocumentDB/databaseAccounts/readMetadata`<br>`Microsoft.DocumentDB/databaseAccounts/sqlDatabases/containers/items/read`<br>`Microsoft.DocumentDB/databaseAccounts/sqlDatabases/containers/executeQuery`<br>`Microsoft.DocumentDB/databaseAccounts/sqlDatabases/containers/readChangeFeed` |