this also required updating the action image to node16
this is a potentially breaking change, so I don't think we want this plugin
image to be tagged 'latest' if/when this change is merged to main
I have also updated the drone pipeline to only publish the image on tag
events, so if we give a proper tag (maybe 2.0.0) this updated plugin image
will be available as plugins/github-actions:2 which will not break existing
pipelines pulling latest