Include commit message in the workflow post

[loneconspirator]

When using the GitHub slack integration to subscribe to GitHub Actions that are invoked by pushing code, it creates a Slack post stating "Workflow was triggered via push by <user>", then lists some details such as Workflow name, Status, and the Commit hash (and branch).

In the case of monitoring a Continuous Integration workflow using slack notifications, including the commit message would be very helpful. Which commit just broke the test suite? The message, rather than only the hash, would be helpful in quickly answering that.

[davidpricedev]

Second this, this is especially important for the deployment notifications. I'd like to use them to announce when releases happen, but without including a commit message indicating what got just got released, its value is pretty weak.

[insano10]

Yes please, I would like this 🙏

[camjc]

Pulling the commit message into the workflow subscriptions would make this a ton more useful. Without it, its likely a lot of orgs have to use custom solutions instead of this.