[Build] Turn off the old GitHub Acitions when the latest one comes on Pull Request

[himself65]

When I push two commits (or more) to the PR. GitHub Actions now will Check all of them, and email me the old commits failed (event the latest passed).

Instead of turn off the old Actions when the new one comes.

Like Travis-CI, they could auto-canceled build

[himself65]

My Outlook has full fill the junk notices :(

[richardlau]

You can manually cancel a workflow but at the moment there is no option to auto-cancel a build: https://github.community/t5/GitHub-Actions/Github-actions-Cancel-redundant-builds/m-p/29549