Update doc for deepfm
Update doc for deepfm

Superjom/models-1,qingqing01/models,lcy-seso/models,PaddlePaddle/models,qingqing01/models,kuke/models,kuke/models,Superjom/models-1,Superjom/models-1,lcy-seso/models,lcy-seso/models,kuke/models,qingqing01/models,PaddlePaddle/models,PaddlePaddle/models,kuke/models