fix dead links in README.md (#10359)
fix dead links in README.md (#10359)

* update README.md

* change to .html

* use v2 api

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