[CHANGELOG] Document bidding onboarding changes.
[CHANGELOG] Document bidding onboarding changes.

artsy/eigen,gaurav1981/eigen,neonichu/eigen,artsy/eigen,Shawn-WangDapeng/eigen,Havi4/eigen,Havi4/eigen,ACChe/eigen,ayunav/eigen,foxsofter/eigen,zhuzhengwei/eigen,gaurav1981/eigen,gaurav1981/eigen,neonichu/eigen,neonichu/eigen,srrvnn/eigen,ACChe/eigen,artsy/eigen,ichu501/eigen,liduanw/eigen,ichu501/eigen,ppamorim/eigen,ACChe/eigen,Shawn-WangDapeng/eigen,orta/eigen,ppamorim/eigen,artsy/eigen,mbogh/eigen,srrvnn/eigen,zhuzhengwei/eigen,mbogh/eigen,srrvnn/eigen,artsy/eigen,TribeMedia/eigen,artsy/eigen,xxclouddd/eigen,ayunav/eigen,TribeMedia/eigen,liduanw/eigen,TribeMedia/eigen,zhuzhengwei/eigen,gaurav1981/eigen,foxsofter/eigen,ppamorim/eigen,xxclouddd/eigen,neonichu/eigen,ayunav/eigen,mbogh/eigen,Havi4/eigen,srrvnn/eigen,TribeMedia/eigen,TribeMedia/eigen,artsy/eigen,xxclouddd/eigen,ayunav/eigen,ashkan18/eigen,ichu501/eigen,ACChe/eigen,xxclouddd/eigen,foxsofter/eigen,foxsofter/eigen,ichu501/eigen,Havi4/eigen,ashkan18/eigen,ashkan18/eigen,liduanw/eigen,gaurav1981/eigen,ashkan18/eigen,orta/eigen,ayunav/eigen,Shawn-WangDapeng/eigen,orta/eigen,foxsofter/eigen,ACChe/eigen,Shawn-WangDapeng/eigen,liduanw/eigen,xxclouddd/eigen,neonichu/eigen,ppamorim/eigen,liduanw/eigen,srrvnn/eigen,ashkan18/eigen,orta/eigen,Shawn-WangDapeng/eigen,zhuzhengwei/eigen,ichu501/eigen,mbogh/eigen