🛠️ Repo: `--exit` tests failing sporadically

### Tooling Suggestion Checklist - [x] I have tried restarting my IDE and the issue persists. - [x] I have pulled the latest `main` branch of the repository. - [x] I have read and agree to Mocha's [Code of Conduct](https://github.com/mochajs/mocha/blob/main/.github/CODE_OF_CONDUCT.md) and [Contributing Guidelines](https://github.com/mochajs/mocha/blob/main/.github/CONTRIBUTING.md) - [x] I have searched for [related issues](https://github.com/mochajs/mocha/issues?q=is%3Aissue) and [issues with the `faq` label](https://github.com/mochajs/mocha/issues?utf8=%E2%9C%93&q=is%3Aissue%20label%3Afaq%20), but none matched my issue. - [x] I want to provide a PR to resolve this ### Overview At least twice in the past year, some or all `--exit` tests have failed in one matrix config, while the same tests in other configs pass. The tests pass on rerun. ### Additional Info Very rare but worth tracking, should be easy to just increase timeout.