Update goods.py
Update goods.py

将产品转化率由默认的2位小数，改为3位小数
OpenERPJeff/gooderp_addons,gilbert-yuan/gooderp_addons,gilbert-yuan/gooderp_addons,gilbert-yuan/gooderp_addons,floraXiao/gooderp_addons,luoguizhou/gooderp_addons,GoodERPJeff/gooderp_addons,Judystudy/gooderp_addons,Judystudy/gooderp_addons,GoodERPJeff/gooderp_addons,OpenERPJeff/gooderp_addons,OpenERPJeff/gooderp_addons,floraXiao/gooderp_addons,floraXiao/gooderp_addons,GoodERPJeff/gooderp_addons,luoguizhou/gooderp_addons,luoguizhou/gooderp_addons,gilbert-yuan/gooderp_addons,Judystudy/gooderp_addons