feat: improve deploy help message to include config file name and default chain

Author: abbesBenayache

cli/src/index.ts

@@ -92,7 +92,7 @@ yargsInstance
     builder: (y) => {
       return y.option('chain', {
         describe:
-          'Specify the blockchain on which the iApp will be deployed (overrides defaultChain configuration)',
+          'Specify the blockchain on which the iApp will be deployed (overrides defaultChain configuration in iapp.config.json)',
         type: 'string',
         choices: SUPPORTED_CHAINS,
       });