message: Add python to Archlinux install instructions
diff: @@ -94,7 +94,7 @@ On Arch Linux, you need a few extra libraries to build Alacritty. Here's a
  to be missing, please open an issue.
  ```sh
  -pacman -S cmake freetype2 fontconfig pkg-config make libxcb libxkbcommon
  +pacman -S cmake freetype2 fontconfig pkg-config make libxcb libxkbcommon python
  ```
  #### Fedora
  