message: Add rust to the list of Arch Linux dependencies
  Fixes
diff: @@ -91,7 +91,7 @@ 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 xclip
  +pacman -S cmake freetype2 fontconfig pkg-config make xclip rust
  ```
  #### Fedora
  