[fix, i18n] plugins/goodreads.koplugin: make untranslated string translatable (#3751)
[fix, i18n] plugins/goodreads.koplugin: make untranslated string translatable (#3751)

Fixes #3748.
poire-z/koreader,koreader/koreader,Frenzie/koreader,NiLuJe/koreader,mwoz123/koreader,Hzj-jie/koreader,Frenzie/koreader,mihailim/koreader,lgeek/koreader,NiLuJe/koreader,houqp/koreader,poire-z/koreader,Markismus/koreader,koreader/koreader,pazos/koreader