GoTest GHA Doesn't Trigger On PRs from outside contributors

[jlewi]

https://github.com/jlewi/foyle/pulls

The "go test and build" workflow is stuck in the "golang test & build Expected — Waiting for status to be reported".

The docs say I should see an approval button but I don't.
https://docs.github.com/en/actions/managing-workflow-runs-and-deployments/managing-workflow-runs/approving-workflow-runs-from-public-forks#approving-workflow-runs-on-a-pull-request-from-a-public-fork

I think the issue could be that in my workflow. I trigger on push

foyle/.github/workflows/test-go.yaml

Line 3 in b4874f5

on: [push]

But not pull request. Since its coming from a fork there presumably isn't a push event to a branch in the repository.