Fix docs after Exporter plugin refactor (#9075)
Fix docs after Exporter plugin refactor (#9075)

The file was moved in <https://github.com/koreader/koreader/pull/8944> but not changed in the docs config.
poire-z/koreader,koreader/koreader,Frenzie/koreader,Frenzie/koreader,poire-z/koreader,NiLuJe/koreader,NiLuJe/koreader,koreader/koreader