update third-party action versions, add dependabot#325

dave-doty merged 4 commits into

devUC-Davis-molecular-computing/scadnano-python-package:devfrom

324-update-3rd-party-action-versionsUC-Davis-molecular-computing/scadnano-python-package:324-update-3rd-party-action-versionsCopy head branch name to clipboard