Revert "Center screenshot in readme"
Revert "Center screenshot in readme"

Turns out the markdown image is not working between HTML tags. And I
don't want to use img tag.

This reverts commit b844d616aac666a03f02cf62e6066e1182053a8a.

Built from 887d283e105d83bb24be7da4fcebbabe0779e305.

ahaasler/hexo-theme-colos,ahaasler/hexo-theme-colos