Recent GH changes re GHA

Hi All, FYI https://github.blog/changelog/2021-05-06-github-actions-beta-api-to-approve-actions-from-forks/ https://github.blog/changelog/2021-04-22-github-actions-maintainers-must-approve-first-time-contributor-workflow-runs/ -- *Gavin McDonald* Systems Administrator ASF Infrastructure Tea

New Concurrency feature of GitHub Actions -> replaces "cancel-workflow" action of mine

Hello everyone, In case you have not noticed, Github Recently (19th of April) introduced a new feature "concurrency" which adds the possibility of cancelling duplicate workflows in a much "nicer" way than the "cancel-workflow-action" I wrote. https://github.blog/changelog/2021-04-19-github-action