giftcard errors coverage (#8413)

* giftcard errors coverage

* Apply suggestions from code review

Co-authored-by: Barny Shergold <barny.shergold@vaimo.com>

Co-authored-by: Barny Shergold <barny.shergold@vaimo.com>

Author: sathiyaaa

src/guides/v2.3/graphql/mutations/remove-giftcard.md

@@ -77,3 +77,10 @@ Attribute |  Data Type | Description
  {% include graphql/cart-object.md %}
 
 [Cart query output]({{page.baseurl}}/graphql/queries/cart.html#cart-output) provides more information about the `Cart` object.
+
+## Errors
+
+Error | Description
+--- | ---
+`Could not find a cart with ID \"xxxxx\"` | The ID provided in the `cart_id` field is invalid or the cart does not exist for the customer.
+`The gift card couldn't be deleted from the quote.` | The value provided in the `gift_card_code` field is invalid or the gift card with that specific ID does not exist in the cart.

src/guides/v2.4/graphql/mutations/remove-giftcard.md

@@ -69,3 +69,10 @@ Attribute |  Data Type | Description
  {% include graphql/cart-object-24.md %}
 
 [Cart query output]({{page.baseurl}}/graphql/queries/cart.html#cart-output) provides more information about the `Cart` object.
+
+## Errors
+
+Error | Description
+--- | ---
+`Could not find a cart with ID \"xxxxx\"` | The ID provided in the `cart_id` field is invalid or the cart does not exist for the customer.
+`The gift card couldn't be deleted from the quote.` | The value provided in the `gift_card_code` field is invalid or the gift card with that specific ID does not exist in the cart.