models: Add Artist.sortname to init docstring
models: Add Artist.sortname to init docstring

kingosticks/mopidy,adamcik/mopidy,jodal/mopidy,quartz55/mopidy,jcass77/mopidy,bencevans/mopidy,vrs01/mopidy,bacontext/mopidy,adamcik/mopidy,mokieyue/mopidy,bencevans/mopidy,diandiankan/mopidy,diandiankan/mopidy,vrs01/mopidy,hkariti/mopidy,diandiankan/mopidy,ZenithDK/mopidy,tkem/mopidy,mopidy/mopidy,ali/mopidy,swak/mopidy,hkariti/mopidy,adamcik/mopidy,jcass77/mopidy,jcass77/mopidy,pacificIT/mopidy,mokieyue/mopidy,kingosticks/mopidy,diandiankan/mopidy,ZenithDK/mopidy,bacontext/mopidy,jodal/mopidy,quartz55/mopidy,ali/mopidy,jmarsik/mopidy,bencevans/mopidy,hkariti/mopidy,swak/mopidy,quartz55/mopidy,jodal/mopidy,jmarsik/mopidy,tkem/mopidy,bencevans/mopidy,ZenithDK/mopidy,ZenithDK/mopidy,vrs01/mopidy,quartz55/mopidy,vrs01/mopidy,tkem/mopidy,pacificIT/mopidy,ali/mopidy,mokieyue/mopidy,pacificIT/mopidy,bacontext/mopidy,ali/mopidy,pacificIT/mopidy,jmarsik/mopidy,mokieyue/mopidy,mopidy/mopidy,swak/mopidy,mopidy/mopidy,swak/mopidy,tkem/mopidy,hkariti/mopidy,bacontext/mopidy,jmarsik/mopidy,kingosticks/mopidy