fix formatting of sep24.mdx

docs/building-apps/wallet/sep24.mdx

@@ -33,6 +33,7 @@ final transferService = await TransferServerSEP24Service.fromDomain("place.domai
 // Or by providing the service url
 final transferService = TransferServerSEP24Service("http://api.stellar-anchor.org/transfer");
 ```
+
 </CodeExample>
 
 First, let's get the information about the anchor's support for [SEP-24]. This request doesn't require authentication, and will return generic info, such as supported currencies, and features supported by the anchor. You can get a full list of returned fields in the [SEP-24 specification](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0024.md#info).
@@ -281,6 +282,7 @@ request.account = "G...";
 
 SEP24InteractiveResponse response = await transferService.withdraw(request);
 ```
+
 </CodeExample>
 
 ## Getting Transaction Info