Default timeout for 'argocd app wait' cli command

[Patanouk]

Hello!

I was wondering what the default timeout when waiting for an argocd app is
This is not specified in the doc: https://argo-cd.readthedocs.io/en/latest/user-guide/commands/argocd_app_wait/

I see from the source code that the default value is '0'', which I assume is no timeout?
https://github.com/argoproj/argo-cd/blob/master/cmd/argocd/commands/app.go#L1447

Assuming my understanding is correct, I would be happy to improve the docs if that makes sense to the maintainers