ci: Use checksum of setup.cfg as cache buster
ci: Use checksum of setup.cfg as cache buster

As that's the file defining the dependencies now.

jcass77/mopidy,jodal/mopidy,adamcik/mopidy,mopidy/mopidy,mopidy/mopidy,jcass77/mopidy,adamcik/mopidy,jodal/mopidy,mopidy/mopidy,jodal/mopidy,kingosticks/mopidy,kingosticks/mopidy,kingosticks/mopidy,jcass77/mopidy,adamcik/mopidy