build: update help page for kodev
build: update help page for kodev

NickSavage/koreader,NiLuJe/koreader,NiLuJe/koreader,houqp/koreader,Frenzie/koreader,mwoz123/koreader,Hzj-jie/koreader,chihyang/koreader,lgeek/koreader,apletnev/koreader,Markismus/koreader,poire-z/koreader,pazos/koreader,robert00s/koreader,mihailim/koreader,poire-z/koreader,frankyifei/koreader,koreader/koreader,Frenzie/koreader,koreader/koreader