[docs] Update functions-deploy.md

[abrahamsangha]

The pulsar-admin CLI lists --className as the correct option; this change will match the CLI. Also corrects --trigger-value; it should be --triggerValue

[wolfstudy]

Thanks @abrahamsangha, the --classname and --trigger-value is working properly, they are compatible mode, so --classname and --className are both ok.

[wolfstudy]

Currently, the help command of bin/pulsar-admin functions create displayed content is as follows

    --classname
       The function's class name

To ensure consistency, I think the current behavior is reasonable.

[wolfstudy]

Thanks @abrahamsangha, just a little comment, PTAL

[jiazhai]

@abrahamsangha Would you please handle @wolfstudy 's comments regarding the className and

    --classname
       The function's class name

[Anonymitaet]

Hi @abrahamsangha any progress on this PR?

[dave2wave]

This PR is evidently stale or abandoned. Reopen if this is not so.