Update changelog for `v6.12.1`
Update changelog for `v6.12.1`

pixel9/nativefier,gfpacheco/Nativefier,zucher/nativefier,pixel9/nativefier,zucher/nativefier,faceair/nativefier-slack,gfpacheco/Nativefier,jiahaog/Nativefier,jiahaog/Nativefier,pixel9/nativefier,skewedlines/Nativefier,skewedlines/Nativefier,faceair/nativefier-slack,jiahaog/Nativefier,skewedlines/Nativefier,zucher/nativefier,gfpacheco/Nativefier