README: fix typo
README: fix typo
apletnev/koreader,NiLuJe/koreader,Frenzie/koreader,lgeek/koreader,mwoz123/koreader,Markismus/koreader,mihailim/koreader,NiLuJe/koreader,houqp/koreader,Frenzie/koreader,koreader/koreader,poire-z/koreader,pazos/koreader,Hzj-jie/koreader,koreader/koreader,poire-z/koreader