update CHANGELOG
update CHANGELOG

Update the changes for 4.3.1

awkward/SDWebImage,iheartradio/SDWebImage,dreampiggy/SDWebImage,dreampiggy/SDWebImage,rs/SDWebImage,dreampiggy/SDWebImage,smule/SDWebImage,awkward/SDWebImage,awkward/SDWebImage,Insfgg99x/SDWebImage,zhang-yawei/SDWebImage,tualatrix/SDWebImage