Actions trigger syntax cleanup

[scottrigby]

Not sure if we really need to test on releases, but may be a good idea? If so, this fixes the syntax per https://help.github.com/en/actions/automating-your-workflow-with-github-actions/events-that-trigger-workflows#release-event-release. If we don't want this, we can just remove the - releases/* branch pattern matching.

[unguiculus]

So, this tests releases as opposed to release branches. I don't see why we would want this.

[davidkarlsen]

Should we just keep this as-is and close this PR? @unguiculus @scottrigby ?

[scottrigby]

Oh hey guys I missed these comments. The thing is we don't make release branches

1. Either way we should remove releases/* since we're not making release branches (it does nothing)
2. testing releases isn't critical, but it would ensure specific releases pass tests

[unguiculus]

The releases/* was added in #13. Don't know why. I'd just remove the releases stuff completely.

[scottrigby]

OK sounds good testing master should be enough for now anyway. We won't cut a release until it succeeds.