[AppImage] AppImageTool 12 (#5275)
[AppImage] AppImageTool 12 (#5275)

https://github.com/AppImage/AppImageKit/releases/tag/12
mwoz123/koreader,koreader/koreader,NiLuJe/koreader,pazos/koreader,poire-z/koreader,NiLuJe/koreader,Frenzie/koreader,mihailim/koreader,koreader/koreader,poire-z/koreader,Frenzie/koreader,Hzj-jie/koreader,Markismus/koreader