Update zh.json
Update zh.json

 I think the current translation was translated by Google translator. I am very good at Chinese. So I correct all Chinese translation.
jrhames/PLAYz-Media-for-PLEX,mrsplendid/PLAYz-Media-for-PLEX,Tekka90/PLAYz-Media-for-PLEX,Tekka90/PLAYz-Media-for-PLEX,abarretojr/PLAYz-Media-for-PLEX,jrhames/PLAYz-Media-for-PLEX,mrsplendid/PLAYz-Media-for-PLEX,braulioholtz/PLAYz-Media-for-PLEX,simonjhogan/PLAYz-Media-for-PLEX,abarretojr/PLAYz-Media-for-PLEX,simonjhogan/PLAYz-Media-for-PLEX,braulioholtz/PLAYz-Media-for-PLEX