Update changelog for `v7.1.0`
Update changelog for `v7.1.0`

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