Prevent Actions to run more than once per software version

[nvk]

@kdunn926 As per title, we need to prevent the action from running again over the same project version.

[nvk]

Check out this error https://github.com/coinkite/bitcoinbinary.org/runs/6594872166?check_suite_focus=true#step:4:26

[kdunn926]

This is expected given that no artifacts were generated. As long as at least one project has an updated artifact the workflow will be all green and this error won't occur.

[nvk]

I guess there is no cleaner way of returning a better response to “nothing to build”

closing the issue