docs: Add Discuss link to readme
docs: Add Discuss link to readme

(cherry picked from commit 61e724eb0e314e5ec5d8e39f2319a1d8a7e193c1)

swak/mopidy,dbrgn/mopidy,vrs01/mopidy,rawdlite/mopidy,mopidy/mopidy,hkariti/mopidy,swak/mopidy,tkem/mopidy,jmarsik/mopidy,hkariti/mopidy,bacontext/mopidy,tkem/mopidy,bacontext/mopidy,ZenithDK/mopidy,glogiotatidis/mopidy,jodal/mopidy,adamcik/mopidy,jmarsik/mopidy,glogiotatidis/mopidy,jmarsik/mopidy,dbrgn/mopidy,pacificIT/mopidy,swak/mopidy,vrs01/mopidy,bacontext/mopidy,SuperStarPL/mopidy,bencevans/mopidy,quartz55/mopidy,bencevans/mopidy,mopidy/mopidy,hkariti/mopidy,SuperStarPL/mopidy,pacificIT/mopidy,pacificIT/mopidy,quartz55/mopidy,jmarsik/mopidy,priestd09/mopidy,diandiankan/mopidy,jcass77/mopidy,jodal/mopidy,kingosticks/mopidy,priestd09/mopidy,mokieyue/mopidy,hkariti/mopidy,tkem/mopidy,quartz55/mopidy,rawdlite/mopidy,jcass77/mopidy,woutervanwijk/mopidy,diandiankan/mopidy,ZenithDK/mopidy,mokieyue/mopidy,bencevans/mopidy,SuperStarPL/mopidy,adamcik/mopidy,priestd09/mopidy,bencevans/mopidy,pacificIT/mopidy,ali/mopidy,ali/mopidy,dbrgn/mopidy,mopidy/mopidy,kingosticks/mopidy,rawdlite/mopidy,ZenithDK/mopidy,glogiotatidis/mopidy,ZenithDK/mopidy,diandiankan/mopidy,quartz55/mopidy,ali/mopidy,adamcik/mopidy,swak/mopidy,dbrgn/mopidy,ali/mopidy,bacontext/mopidy,woutervanwijk/mopidy,SuperStarPL/mopidy,mokieyue/mopidy,kingosticks/mopidy,glogiotatidis/mopidy,rawdlite/mopidy,diandiankan/mopidy,vrs01/mopidy,jcass77/mopidy,tkem/mopidy,vrs01/mopidy,jodal/mopidy,mokieyue/mopidy