PROMO-1256: addressed PR comments

Author: bc-anshumishra

reference/promotions.v3.yml

@@ -334,7 +334,7 @@ paths:
                   maxLength: 20
                 code_length:
                   type: integer
-                  description: 'The length of the random string to be generated for each coupon code. The value must be between 6 and 16. The total length of each generated coupon code is calculated as: `code_length` + length of `prefix` + length of `suffix`. The maximum total length of a coupon code is 50.'
+                  description: 'The length of the random string to be generated for each coupon code. The value must be between 6 and 16. The default length is 16. The total length of each generated coupon code is calculated as: `code_length` + length of `prefix` + length of `suffix`. The maximum total length of a coupon code is 50.'
                   example: 10
                   minimum: 6
                   maximum: 16