chore: revert inconsistent change

crates/script/src/simulate.rs

@@ -112,11 +112,10 @@ impl PreSimulationState {
         // Executes all transactions from the different forks concurrently.
         let futs = transactions
             .into_iter()
-            // NOTE(zk): this one is `mut` upstream but doesn't need to be
-            .map(|transaction| async {
+            .map(|mut transaction| async {
                 let mut runner = runners.get(&transaction.rpc).expect("invalid rpc url").write();
                 let zk_metadata = transaction.zk.clone();
-                let tx = transaction.tx(); // NOTE(zk): this one is also `mut` upstream but doesn't need to be
+                let tx = transaction.tx_mut();
 
                 let to = if let Some(TxKind::Call(to)) = tx.to() { Some(to) } else { None };
                 let result = runner