fix: channel file name macro doesn't work when channel is latest
fix: channel file name macro doesn't work when channel is latest

Close #1778

mastergberry/electron-builder,ledinhphuong/electron-builder,ledinhphuong/electron-builder,ledinhphuong/electron-builder,MariaDima/electron-builder,develar/electron-builder,ledinhphuong/electron-builder,ledinhphuong/electron-builder,MariaDima/electron-builder,mastergberry/electron-builder,loopline-systems/electron-builder,develar/electron-builder,MariaDima/electron-builder,loopline-systems/electron-builder,develar/electron-builder,MariaDima/electron-builder,electron-userland/electron-builder,electron-userland/electron-builder,MariaDima/electron-builder,loopline-systems/electron-builder,develar/electron-builder,loopline-systems/electron-builder,MariaDima/electron-builder,mastergberry/electron-builder,loopline-systems/electron-builder,mastergberry/electron-builder,electron-userland/electron-builder,ledinhphuong/electron-builder