RFE: Use job name instead of workflow name

[gjvoosten]

All messages are posted with the name of the action (github.context.workflow).
If you have a build matrix, that makes it hard to distinguish messages originating from different jobs. It would improve things if the message used the job name (falling back to job id if no name has been set).

I'd supply a PR if I had any idea how to get the current job name from the context, sorry…

[winem]

This would be great!