Update 3. Demonstrate ability to customize the shopping cart.md

Author: unicoder88

8. Customizing the Checkout Process/3. Demonstrate ability to customize the shopping cart.md

@@ -27,6 +27,7 @@ Usage tracking:
   * rule_id, customer_id, times_used
 - `salesrule_coupon_aggregated`, `salesrule_coupon_aggregated_updated`, `salesrule_coupon_aggregated_order` - reporting stuff
 
+Notes:
 - ui component `sales_rule_form`
 - conditions - html content block - *generic form* Edit\Tab\Conditions
 - conditions fieldset renderer \Magento\Rule\Block\Conditions.render