Fix docs (#7674)
Fix docs (#7674)

See https://github.com/koreader/koreader/pull/7668#issuecomment-840404170
poire-z/koreader,NiLuJe/koreader,poire-z/koreader,koreader/koreader,NiLuJe/koreader,koreader/koreader,Frenzie/koreader,Frenzie/koreader,mwoz123/koreader