Improve the output - help message

[krol3]

Current options in the chain-bench version 0.1.3

Flags:
  -c, --config-file string   the path to a local configuration file
  -h, --help                 help for chain-bench
  -l, --log-file string      set to print logs into a file
      --log-format string    sets the format of the logs (normal, json)
      --no-color             disables output color
  -o, --output-file string   the path to a file that will contain the results of the scanning
  -q, --quiet                silence logs, prints only error messages
  -v, --verbose count        set the verbosity level (-v: debug, -vv: trace), default: info
      --version              version for chain-bench

The message could be improved to explain that only support json. Similar like to

-o, --output-file string Export in json the results of the scanning

[krol3]

@morwn if this it's a valid issue, I can help with that.

[naortalmor1]

Sure go for it 😄