[fixed] PSA: GitHub Actions are a bit broken this morning - missing SHAs and Refs

See https://github.com/actions/checkout/issues/49.

It appears when you trigger an action from a push this morning, various essential variables are missing; GITHUB_SHA is undefined, the base ref is undefined.  This means if you run an action on a branch, the “checkout” action will accidentally checkout master.  If you try to push a docker image or some other artifact to some external server and the name is based on the SHA, the SHA will just be an empty string.

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Thanks for letting us know, and sorry for the inconvenience.  We’re working on this now.