Update Payments FAQ (#7845)

Signed-off-by: samina <[email protected]>
Co-authored-by: graphite-app[bot] <96075541+graphite-app[bot]@users.noreply.github.com>

Author: saminacodes

apps/portal/src/app/payments/faq/page.mdx

@@ -23,6 +23,17 @@ health, price, and speed to guarantee the best path every time.
 Yes, Payments is designed to be agnostic to wallet infrastructure. You can use it with any wallet service. 
 </Details>
 
+<Details summary="How can I split the payment between multiple destination wallet addresses?"> 
+You can use the thirdweb [Split contract](https://thirdweb.com/thirdweb.eth/Split) to handle this.
+
+- Deploy the Split contract with the set of beneficiary addresses. (These are immutable and fixed at deploy time.)
+- Set the Split contract address as the sale recipient in your configuration.
+- Distribute the funds at any time by calling the distribute() function on the contract.
+
+This will automatically split payments according to the allocation you defined during deployment.
+
+</Details>
+
 ### Fees
 
 <Details summary="What are the fees for Buy With Fiat?">