Fix up CI auto-release

[applecuckoo]

Hi there @lvh, I came across this book and I saw that you had an auto-release step in GitHub Actions. I saw that the latest commit wasn't being auto-released and I traced that issue down to the responsible action from this repo where the author hasn't migrated the Node.js version being used from 12 to 16, which is a problem since GitHub is deprecating Node.js 12 actions. It seems that this repo is being recommended instead as it is actively maintained. Thanks!