Update STARGIFT_EXPORT_IN_PROGRESS description

Author: KurimuzonAkuma

compiler/errors/source/406_NOT_ACCEPTABLE.tsv

@@ -22,7 +22,7 @@ PREMIUM_CURRENTLY_UNAVAILABLE	You cannot currently purchase a Premium subscripti
 PREVIOUS_CHAT_IMPORT_ACTIVE_WAIT_XMIN	Import for this chat is already in progress, wait {value} minutes before starting a new one.
 PRIVACY_PREMIUM_REQUIRED	You need a [Telegram Premium subscription](https://core.telegram.org/api/premium) to send a message to this user.
 SEND_CODE_UNAVAILABLE	Returned when all available options for this type of number were already used (e.g. flash-call, then SMS, then this error might be returned to trigger a second resend).
-STARGIFT_EXPORT_IN_PROGRESS	Gift export in progress.
+STARGIFT_EXPORT_IN_PROGRESS	You can't send this gift at the moment as the withdrawal process to the blockchain has already started.
 STARGIFT_MESSAGE_INVALID	The provided message for this gift is invalid.
 STARGIFT_USAGE_LIMITED	Star gift usage limited.
 STARS_FORM_AMOUNT_MISMATCH	Stars form amount mismatch.