Confusing help information of nanomq_cli

[wangha]

Describe the bug

Here is the part of the help information.

  -i, --interval <ms>              Interval of publishing message (ms) [default: 10]
  -i, --identifier <identifier>    The client identifier UTF-8 String (default randomly generated string)

Actual Behavior
It seems the -i value will be set to identifier.

Environment Details

• NanoMQ version. latest
• Operating system and version
• Compiler and language used
• testing scenario

[OdyWayne]

fixed in #1756

[wangha]

Do any docs need to be updated? @OdyWayne

[OdyWayne]

Do any docs need to be updated? @OdyWayne

nothing wrong with docs.