update to add gif

Author: youssefea

docs/base-account/guides/accept-payments.mdx

@@ -59,7 +59,7 @@ try {
 This is what the user will see when prompted to pay:
 
 <div style={{ display: 'flex', justifyContent: 'center'}}>
-  <img src="/images/base-account/BasePayFlow.png" alt="Pay Popup" style={{ width: '300px', height: 'auto' }} />
+  <img src="/images/base-account/BasePayFinal.gif" alt="Pay Popup" style={{ width: '500px', height: 'auto' }} />
 </div>
 
 ### Collect user information (optional)