internal/ethapi: fix comment typo (ethereum#25548)

Author: ucwong

internal/ethapi/transaction_args.go

@@ -238,7 +238,7 @@ func (args *TransactionArgs) ToMessage(globalGasCap uint64, baseFee *big.Int) (t
 			gasPrice = args.GasPrice.ToInt()
 			gasFeeCap, gasTipCap = gasPrice, gasPrice
 		} else {
-			// User specified 1559 gas feilds (or none), use those
+			// User specified 1559 gas fields (or none), use those
 			gasFeeCap = new(big.Int)
 			if args.MaxFeePerGas != nil {
 				gasFeeCap = args.MaxFeePerGas.ToInt()