Action can hang if pipeline fails early

[snewton-eb]

Hi all, appreciate this action! It's very handy!

I noticed that, when I had a bug in an action recently passing a nonsense value for the git branch, even though the pipeline in Cycle failed, the action hung until we canceled it.

Here's what the body of our action looks like, this is working! But what made it hang was passing the wrong string in as the branch variable

Here's what we saw in the action (note it ran for more than 7 minutes before we cancelled)

And here's the error reported from the Cycle dash