[FAB-6902] FAB-6904 correct the sample for FAB-6904

Maybe this sub-task is too stricky and tiny. 
To make the source easier to be read together as explained in the WYFA doc.

Change-Id: Icc0dc56c3e25ca7b8d4828935addd5ec7229e51c
Signed-off-by: Min Luo <luomin_tokyotech@hotmail.com>

fabcar/invoke.js

@@ -56,7 +56,7 @@ Fabric_Client.newDefaultKeyValueStore({ path: store_path
  console.log("Assigning transaction_id: ", tx_id._transaction_id);
 
  // createCar chaincode function - requires 5 args, ex: args: ['CAR12', 'Honda', 'Accord', 'Black', 'Tom'],
- // changeCarOwner chaincode function - requires 2 args , ex: args: ['CAR10', 'Barry'],
+ // changeCarOwner chaincode function - requires 2 args , ex: args: ['CAR10', 'Dave'],
  // must send the proposal to endorsing peers
  var request = {
  //targets: let default to the peer assigned to the client