Create workflow to label PRs needing rebase (#15931)
Create workflow to label PRs needing rebase (#15931)

* Create workflow to label PRs needing rebase

* Remove comments

* Use workflow in mdn/workflows repo

* Pass in required secrets
chrisdavidmills/browser-compat-data,chrisdavidmills/browser-compat-data,mdn/browser-compat-data,mdn/browser-compat-data