Update the source of the value for offer_code in events to the SK2 endpoint (#926)

Author: MarkVillacampa

docs/integrations/webhooks/event-types-and-fields.mdx

@@ -88,7 +88,7 @@ If we have to retry a webhook for any reason, the retry will have the same `id`
 | `transferred_from`              | String[] | This field is only available when `type` is set to `TRANSFER`. App User ID(s) that transactions and entitlements are being taken from, and granted to `transferred_to`.                                                                                                                                                                                                                                                                                                                                                                           |                                                                                                                                                                                                                 |
 | `transferred_to`                | String[] | This field is only available when `type` is set to `TRANSFER`. App User ID(s) that are receiving the transactions and entitlements taken from `transferred_from`.                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                 |
 | `country_code`                  | String   | The ISO 3166 country code that the product was purchased in. The two-letter country code (e.g., US, GB, CA) of the app user's location (this country code is derived from the last seen request from the SDK for the subscriber.)                                                                                                                                                                                                                                                                                                                 | `US`, `CA`, etc.                                                                                                                                                                                                |
-| `offer_code`                    | String   | Not available when `type` is set to `SUBSCRIBER_ALIAS` or `TRANSFER`. The offer code that the customer used to redeem the transaction. Available for App Store and Play Store. For App Store this property corresponds to the [`offer_code_ref_name`](https://developer.apple.com/documentation/appstorereceipts/offer_code_ref_name). For Play Store this corresponds to the [`promotionCode`](https://developers.google.com/android-publisher/api-ref/rest/v3/purchases.subscriptions). Can be null if no offer code was used for this product. |                                                                                                                                                                                                                 |
+| `offer_code`                    | String   | Not available when `type` is set to `SUBSCRIBER_ALIAS` or `TRANSFER`. The offer code that the customer used to redeem the transaction. Available for App Store and Play Store. For App Store this property corresponds to the [`offerIdentifier`](https://developer.apple.com/documentation/appstoreserverapi/offeridentifier). For Play Store this corresponds to the [`promotionCode`](https://developers.google.com/android-publisher/api-ref/rest/v3/purchases.subscriptions). Can be null if no offer code was used for this product. |                                                                                                                                                                                                                 |
 | `renewal_number`                | Integer  | The number of renewals that this subscription has already gone through. Always starts at 1. Trial conversions are counted as renewals. `is_trial_conversion` is used to signify whether a transaction was a trial conversion.                                                                                                                                                                                                                                                                                                                     |                                                                                                                                                                                                                 |
 
 :::info Determine trial and subscription duration