fix slick-codegen dependency in upgrade guide
fix slick-codegen dependency in upgrade guide

mustajarvi/slick,Radsaggi/slick,dotta/slick,InsideVault/slick,marko-asplund/slick,jkutner/slick,nremond/slick,trevorsibanda/slick,adamkozuch/slick,xavier-fernandez/slick,easel/slick,jkutner/slick,mustajarvi/slick,nremond/slick,InsideVault/slick,knoldus/slick-1,nmartynenko/slick,Radsaggi/slick,AtkinsChang/slick,lukasz-golebiewski/slick,seebcioo/slick,lukasz-golebiewski/slick,AtkinsChang/slick,kwark/slick,nmartynenko/slick,bmclane/slick,easel/slick,adamkozuch/slick,nafg/slick,nremond/slick,knoldus/slick-1,xavier-fernandez/slick,dotta/slick,seebcioo/slick,xavier-fernandez/slick,olivergg/slick,nuodb/slick,bmclane/slick,Asamsig/slick,olivergg/slick