Install an icon that is compatible with KDE

Description:

KDE (and other DEs that use qt-svg) can't render a default Alacritty svg icon correctly. Compatible icon is provided upstream. For example, it's used in gentoo: https://github.com/gentoo/gentoo/commit/62d6e89027f5ff51f45fbbf564f7f802fb90f378

Additional info:

Steps to reproduce:

  1. Run a desktop environment that uses qt-svg to render svg icons
  2. Download alacritty