🐹 Fix Go channel rotation account handling

Co-authored-by: Codex <noreply@openai.com>

Author: JFWooten4

docs/build/guides/transactions/channel-accounts.mdx

@@ -859,9 +859,10 @@ func main() {
 
   // index = 0-4 in our example
   for index, account := range channelAccounts {
+    simpleAccount := txnbuild.NewSimpleAccount(account.AccountID, account.Sequence)
 		channelAccountsTracker[index] = map[string]interface{}{
-			"account": account,
-			"keypair": channelKeypairs[i],
+			"account": &simpleAccount,
+			"keypair": channelKeypairs[index],
 			"state":   "available",
 		}
 	}
@@ -908,7 +909,7 @@ func main() {
 				tx, err = tx.Sign(
           network.TestNetworkPassphrase,
           primaryKeypair,
-          channelData["keypair"].(*keypair.Full)
+          channelData["keypair"].(*keypair.Full),
         )
 				check(err)
 
@@ -918,8 +919,9 @@ func main() {
 					  channelData map[string]interface{}
 				  }{
             transaction: tx,
-            channelData: channelData
-          })
+            channelData: channelData,
+          },
+        )
 			} else {
 				fmt.Println("No available channel account. Waiting...")
         // Perhaps sleep here