Option to wait for workflows to be triggered

[fharper]

In my case, I call hukum sometimes way too fast before I did my PR, that GitHub jobs didn't kick in yet. I added hukum part of a script, and it would be useful for me to have hukum wait for jobs to start, maybe with an additional flag you can use when you know there are workflows that will be triggered for sure. For now, I add a sleep in between pushing my PR, and waiting for the job to start, but this would be a more elegant way to do it.