Add a GitHub Action to cancel previous runs (#2180)
Add a GitHub Action to cancel previous runs (#2180)

## Issue Addressed

It takes over 20 minutes to run the GitHub Workflow for lighthouse. It would be time-saving to cancel previous runs. 

## Proposed Changes

Added [styfle/cancel-workflow-action](https://github.com/styfle/cancel-workflow-action) to our workflow. I've configured the action according to [Advanced settings](https://github.com/styfle/cancel-workflow-action#advanced).




sigp/lighthouse,sigp/lighthouse,sigp/lighthouse,sigp/lighthouse