message: Add info about default configuration for macOS
diff: @@ -234,8 +234,10 @@ cp -r target/release/osx/Alacritty.app /Applications/
  Although it's possible the default configuration would work on your system,
  you'll probably end up wanting to customize it anyhow. There is a default
  -`alacritty.yml` at the git repository root. Alacritty looks for the
  -configuration file as the following paths:
  +`alacritty.yml` and `alacritty_macos.yml` at the git repository root for
  +Linux and macOS repsectively.
  +
  +Alacritty looks for the configuration file at the following paths:
  1. `$XDG_CONFIG_HOME/alacritty/alacritty.yml`
  2. `$XDG_CONFIG_HOME/alacritty.yml`
  @@ -252,7 +254,7 @@ the config file. The only exception is the `font` and `dimensions` sections
  which requires Alacritty to be restarted. For further explanation of the config
  file, please consult the comments in the default config file.
  -## Issues (known, unknown, feature requests, etc)
  +## Issues (known, unknown, feature requests, etc.)
  If you run into a problem with Alacritty, please file an issue. If you've got a
  feature request, feel free to ask about it. Keep in mind that Alacritty is very
  