Corrected ordered list

1. Indented item body for correct order number
1. Used `1.` with each item for convinence

See rendered: https://github.com/fritx/responsive-nav.js/compare/viljamis:master...patch-1?name=patch-1&short_path=04c6e90#diff-04c6e90faac2675aa89e2176d2eec7d8