Update code to reflect latest changes to the Bot API documentation

Author: TiiFuchs

src/Telegram/StarTransaction.php

@@ -9,7 +9,7 @@
 use Telepath\Types\Type;
 
 /**
- * Describes a Telegram Star transaction.
+ * Describes a Telegram Star transaction. Note that if the buyer initiates a chargeback with the payment provider from whom they acquired Stars (e.g., Apple, Google) following this transaction, the refunded Stars will be deducted from the bot's balance. This is outside of Telegram's control.
  */
 class StarTransaction extends Type
 {

src/Telegram/SuccessfulPayment.php

@@ -9,7 +9,7 @@
 use Telepath\Types\Type;
 
 /**
- * This object contains basic information about a successful payment.
+ * This object contains basic information about a successful payment. Note that if the buyer initiates a chargeback with the relevant payment provider following this transaction, the funds may be debited from your balance. This is outside of Telegram's control.
  */
 class SuccessfulPayment extends Type
 {