New feature tabular / vertically aligned values missing from main project readme

[Gaibhne]

I found https://github.com/vasilevich/nginxbeautifier/pull/7 by accident because it was linked in another issue, and was excited to find it already merged and working. But I wouldn't have thought so from https://github.com/vasilevich/nginxbeautifier#usage - -a and --align are missing from the usage section.