pybind11/.github/pull_request_template.md

## Description

<!-- Include relevant issues or PRs here, describe what changed and why -->


## Suggested changelog entry:

<!-- Fill in the below block with the expected RestructuredText entry. Delete if no entry needed;
     but do not delete header or rst block if an entry is needed! Will be collected via a script. -->

```rst

```

<!-- If the upgrade guide needs updating, note that here too -->