This plugin can be set to notify a channel when a job Starts, Fails or has Succeeded
Rundeck is an open orchestration and scheduling platform used for operations support tasks, enterprise job scheduling, deployment, and more.
It's commonly found in the ChatOps space due to its flexible API.
Download the rundeck-rocketchat-notifier from GitHub
Set up an Incoming Integration and take note of the URL
Install the plugin on your RunDeck machine as per the instructions in the git repo linked above.
Once configured you'll have notifications like the example below: