This updates the publish-unit-test-result integration with support for
pull requests coming from forked repositories. The update changes the
behaviour so that (a) unit test results are displayed as a comment, and
(b) macOS and Windows builds no longer time out during the CI action.
The official guide for the publish-unit-test-result action has been
followed for this purpose. See the official readme at:
https://github.com/EnricoMi/publish-unit-test-result-action/blob/v1.23/README.md#support-fork-repositories-and-dependabot-branches