How do I set up a trigger to transition an issue on GitHub pull request rejected (closed)

[Gal Bashan]

We are using bors-ng merge bot to merge our pull requests to master (our repository is hosted on GitHub). Instead of merging a pull request, this bot closes the pull request and merges the commits that make the pull request through an external staging branch.

I would like to create a trigger to transition an issue from `In Review` to `Done` based on when a pull request is closed (not necessarily merged). Is there a way to do it?

We are using Jira Cloud.