fix prelu doc (#5807)
fix prelu doc (#5807)


PaddlePaddle/Paddle,pkuyym/Paddle,baidu/Paddle,putcn/Paddle,lcy-seso/Paddle,luotao1/Paddle,reyoung/Paddle,luotao1/Paddle,lcy-seso/Paddle,QiJune/Paddle,Canpio/Paddle,chengduoZH/Paddle,pkuyym/Paddle,reyoung/Paddle,PaddlePaddle/Paddle,Canpio/Paddle,lcy-seso/Paddle,tensor-tang/Paddle,luotao1/Paddle,Canpio/Paddle,tensor-tang/Paddle,Canpio/Paddle,putcn/Paddle,PaddlePaddle/Paddle,chengduoZH/Paddle,putcn/Paddle,reyoung/Paddle,Canpio/Paddle,Canpio/Paddle,baidu/Paddle,jacquesqiao/Paddle,QiJune/Paddle,luotao1/Paddle,putcn/Paddle,tensor-tang/Paddle,jacquesqiao/Paddle,jacquesqiao/Paddle,baidu/Paddle,reyoung/Paddle,jacquesqiao/Paddle,QiJune/Paddle,jacquesqiao/Paddle,pkuyym/Paddle,QiJune/Paddle,QiJune/Paddle,chengduoZH/Paddle,PaddlePaddle/Paddle,PaddlePaddle/Paddle,QiJune/Paddle,pkuyym/Paddle,baidu/Paddle,Canpio/Paddle,PaddlePaddle/Paddle,lcy-seso/Paddle,luotao1/Paddle,tensor-tang/Paddle,reyoung/Paddle,luotao1/Paddle,chengduoZH/Paddle,Canpio/Paddle,putcn/Paddle,reyoung/Paddle,pkuyym/Paddle,jacquesqiao/Paddle,pkuyym/Paddle,luotao1/Paddle,tensor-tang/Paddle,putcn/Paddle,chengduoZH/Paddle,baidu/Paddle,lcy-seso/Paddle,lcy-seso/Paddle,PaddlePaddle/Paddle