Update the document of jcli job

[yunpengb]

Is your feature request related to a problem? Please describe.
The document does not describe this implemented function

Describe the solution you'd like
Update document

Describe alternatives you've considered
use commond below:
jcli job history -d {x} {jobname}
will delete specific build which build-number is x of a job,this feature should write into document text

Additional context
no