Checks from forks don't run

For example: https://github.com/ASFHyP3/hyp3/pull/1461

Only half(?) of the changelog updated check runs on forks, and the rest of the checks don't seem to run at all. We likely just need to add

```yaml
on:
  pull_request:
    types:
      - opened
      - labeled
      - unlabeled
      - synchronize
```

to our workflows