Auto-cancel stale previous Docker builds (#753)
Auto-cancel stale previous Docker builds (#753)

* Auto-cancel stale previous Docker builds

* Auto-cancel stale previous Docker builds -- updated

* Tweak
chanzuckerberg/idseq-web,chanzuckerberg/idseq-web,chanzuckerberg/idseq-web,chanzuckerberg/idseq-web,chanzuckerberg/idseq-web