remove text-indent for headings in mobile

[paradite]

Problem

text-indent was introduced for compensating the blue ticks before the headings https://github.com/pages-themes/architect/blob/27f3b20dfb55063555c3f029dcffe75f3d067fb2/_sass/jekyll-theme-architect.scss#L197

They were not removed in mobile, whereas the blue ticks were removed https://github.com/pages-themes/architect/blob/27f3b20dfb55063555c3f029dcffe75f3d067fb2/_sass/jekyll-theme-architect.scss#L377-L379

This results in extra indentation in mobile.

Solution

This css change removes unnecessary text-indent in mobile.

Before / After

Using my own page because I am a bit lazy for reproducing this...

before	after

live website effect reference: https://retire35.com/

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