chore(readme): move issue badge down to contributing
chore(readme): move issue badge down to contributing

Chatie/wechaty,wechaty/wechaty,binsee/wechaty,binsee/wechaty,Chatie/wechaty,zixia/wechaty,Chatie/wechaty,mukaiu/wechaty,mukaiu/wechaty,wechaty/wechaty,mukaiu/wechaty,zixia/wechaty,wechaty/wechaty,lijiarui/wechaty,binsee/wechaty,lijiarui/wechaty