Fixed limit mention

Author: mnocon

docs/discounts/discounts_api.md

@@ -113,7 +113,7 @@ The example below contains a Command creating a cart discount. The discount:
 - [depends](#conditions) on
     - being bought from Germany or France
     - 2 products
-    - a `summer10` [discount code](#discount-codes) which can be used unlimited number of times
+    - a `summer10` [discount code](#discount-codes) which can be used only 10 times, but a single customer can use the code multiple times
 
 ``` php hl_lines="60-66 68-92"
 [[= include_file('code_samples/discounts/src/Command/ManageDiscountsCommand.php') =]]