message: Update README.md
  Small fix for markdown parsing, github fudges this
diff: @@ -74,6 +74,7 @@ apt-get install cmake libfreetype6-dev libfontconfig1-dev xclip
  On Arch Linux, you need a few extra libraries to build Alacritty. Here's a
  `pacman` command that should install all of them. If something is still found
  to be missing, please open an issue.
  +
  ```sh
  pacman -S cmake freetype2 fontconfig xclip
  ```
  