Update TRANSITION.md
Update TRANSITION.md

Added some clarification around ActiveModelSerializer terminology.
flowjzh/data,EmberSherpa/data,minasmart/data,lostinpatterns/data,pdud/data,lostinpatterns/data,BBLN/data,fsmanuel/data,nickiaconis/data,lostinpatterns/data,bcardarella/data,XrXr/data,zoeesilcock/data,greyhwndz/data,heathharrelson/data,gniquil/data,eriktrom/data,thaume/data,andrejunges/data,wecc/data,H1D/data,tonywok/data,acburdine/data,BookingSync/data,offirgolan/data,PrecisionNutrition/data,courajs/data,PrecisionNutrition/data,BookingSync/data,seanpdoyle/data,whatthewhat/data,tonywok/data,splattne/data,vikram7/data,ryanpatrickcook/data,BookingSync/data,fpauser/data,jmurphyau/data,Kuzirashi/data,offirgolan/data,swarmbox/data,jmurphyau/data,faizaanshamsi/data,ryanpatrickcook/data,zoeesilcock/data,davidpett/data,wecc/data,EmberSherpa/data,workmanw/data,Robdel12/data,gkaran/data,Turbo87/ember-data,eriktrom/data,martndemus/data,arenoir/data,tarzan/data,fpauser/data,greyhwndz/data,tarzan/data,bcardarella/data,courajs/data,duggiefresh/data,splattne/data,fsmanuel/data,HeroicEric/data,intuitivepixel/data,Addepar/ember-data,InboxHealth/data,davidpett/data,stefanpenner/data,kappiah/data,tstirrat/ember-data,minasmart/data,usecanvas/data,splattne/data,k-fish/data,minasmart/data,PrecisionNutrition/data,kappiah/data,gabriel-letarte/data,yaymukund/data,nickiaconis/data,sebweaver/data,faizaanshamsi/data,Turbo87/ember-data,jgwhite/data,intuitivepixel/data,jmurphyau/data,H1D/data,bf4/data,sammcgrail/data,HeroicEric/data,knownasilya/data,kimroen/data,Turbo87/ember-data,splattne/data,mphasize/data,sebastianseilund/data,sebastianseilund/data,faizaanshamsi/data,H1D/data,slindberg/data,EmberSherpa/data,whatthewhat/data,bcardarella/data,dustinfarris/data,davidpett/data,fpauser/data,sammcgrail/data,workmanw/data,BBLN/data,hibariya/data,rtablada/data,ryanpatrickcook/data,nickiaconis/data,acburdine/data,Eric-Guo/data,sebastianseilund/data,tstirrat/ember-data,gniquil/data,simaob/data,hibariya/data,flowjzh/data,dustinfarris/data,danmcclain/data,kappiah/data,kimroen/data,topaxi/data,rtablada/data,fpauser/data,funtusov/data,usecanvas/data,trisrael/em-data,hibariya/data,k-fish/data,martndemus/data,heathharrelson/data,gkaran/data,vikram7/data,Addepar/ember-data,vikram7/data,nickiaconis/data,tonywok/data,stefanpenner/data,greyhwndz/data,pdud/data,bf4/data,simaob/data,intuitivepixel/data,danmcclain/data,mphasize/data,wecc/data,gabriel-letarte/data,eriktrom/data,XrXr/data,andrejunges/data,rtablada/data,ryanpatrickcook/data,whatthewhat/data,XrXr/data,thaume/data,sebweaver/data,courajs/data,Robdel12/data,tarzan/data,sebweaver/data,arenoir/data,slindberg/data,minasmart/data,knownasilya/data,greyhwndz/data,bf4/data,eriktrom/data,FinSync/ember-data,workmanw/data,gkaran/data,usecanvas/data,duggiefresh/data,webPapaya/data,jmurphyau/data,martndemus/data,k-fish/data,duggiefresh/data,Addepar/ember-data,whatthewhat/data,wecc/data,yaymukund/data,slindberg/data,webPapaya/data,lostinpatterns/data,PrecisionNutrition/data,usecanvas/data,flowjzh/data,simaob/data,yaymukund/data,Robdel12/data,Eric-Guo/data,offirgolan/data,bf4/data,sammcgrail/data,Turbo87/ember-data,faizaanshamsi/data,andrejunges/data,dustinfarris/data,workmanw/data,zoeesilcock/data,XrXr/data,kimroen/data,flowjzh/data,stefanpenner/data,EmberSherpa/data,vikram7/data,BBLN/data,webPapaya/data,kappiah/data,InboxHealth/data,tstirrat/ember-data,webPapaya/data,funtusov/data,stefanpenner/data,pdud/data,in4mates/ember-data,jgwhite/data,zoeesilcock/data,H1D/data,Robdel12/data,gabriel-letarte/data,danmcclain/data,acburdine/data,andrejunges/data,seanpdoyle/data,swarmbox/data,InboxHealth/data,yaymukund/data,tstirrat/ember-data,davidpett/data,swarmbox/data,gkaran/data,Eric-Guo/data,in4mates/ember-data,gniquil/data,HeroicEric/data,FinSync/ember-data,sammcgrail/data,offirgolan/data,Kuzirashi/data,gabriel-letarte/data,swarmbox/data,mphasize/data,martndemus/data,knownasilya/data,seanpdoyle/data,in4mates/ember-data,Eric-Guo/data,duggiefresh/data,funtusov/data,fsmanuel/data,tonywok/data,jgwhite/data,FinSync/ember-data,topaxi/data,funtusov/data,rtablada/data,trisrael/em-data,thaume/data,trisrael/em-data,jgwhite/data,sebweaver/data,bcardarella/data,BookingSync/data,gniquil/data,sebastianseilund/data,acburdine/data,heathharrelson/data,k-fish/data,arenoir/data,pdud/data,fsmanuel/data,tarzan/data,HeroicEric/data,intuitivepixel/data,thaume/data,topaxi/data,FinSync/ember-data,heathharrelson/data,dustinfarris/data,Kuzirashi/data,seanpdoyle/data,danmcclain/data,mphasize/data,topaxi/data,hibariya/data,Kuzirashi/data,simaob/data,BBLN/data,arenoir/data,courajs/data,InboxHealth/data