This patch adds concurrency groups to the CI workflows to automatically
cancel any in-progress workflows when a pull request has been updated.
A `concurrency` group allows to ensure that a single job or workflow
will run at a time. For example, when a pull request is updated with
a force-push, the GiHub CI workflows currently in-progress will be
automatically cancelled, and the CI would run only with the updated
commits.
https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#concurrency
Signed-off-by: Radostin Stoyanov <rstoyanov@fedoraproject.org>
