fix: getRefs function to handle merge_group events

[louis-bompart]

Fixes #456

Essentially, put #456 (comment) in the code.

To the best of my knowledge, this should work, because a merge_group event is a PullRequestEvent I think.

[louis-bompart]

👋 @elireisman, sorry for the poke; I was hoping to get a review on this 😶. I think it's a quick win ;)
Feel free to redirect me to someone else if I'm barking at the wrong tree 😄
Thanks!

[elireisman]

This LGTM - and sorry I didn't see this alt. PR sooner, I think I last interacted on the other that was closed out?

I'll also ping our new FR for a second pair of 👀 before we land it cc @pcarlisle

Thanks again for the contribution! ❤️

[louis-bompart]

Thanks 🙌
I saw 47a6b35 ❌ on https://github.com/actions/dependency-review-action/actions/runs/8933751781/job/24923072522
I'm assuming this was caused by my branch being a few commits behind main, so I rebased my branch onto main with 92ca1f7

[elireisman]

👋 I think you need to update the PR one more time prior to re-review (see the check-dist entry)

[louis-bompart]

👋 I think you need to update the PR one more time prior to re-review (see the check-dist entry)

My bad! I missed the npm run package 😅 before committing. Should be fixed in e7e99e1