fix: fix alacritty after migrating from NixOS

alacritty/.config/alacritty/alacritty.yml

@@ -18,6 +18,7 @@ env:
   TERM: xterm-256color
 
 window:
+  opacity: 0.9
   # Window dimensions (changes require restart)
   #
   # Specified in number of columns/lines, not pixels.
@@ -245,7 +246,6 @@ font:
 # Window opacity as a floating point number from `0.0` to `1.0`.
 # The value `0.0` is completely transparent and `1.0` is opaque.
 #background_opacity: 1.0
-background_opacity: 0.9
 
 #selection:
 # This string contains all characters that are used as separators for "semantic words" in Alacritty.
@@ -285,7 +285,7 @@ background_opacity: 0.9
 #   - (Linux/BSD) user login shell
 #   - (Windows) powershell
 shell:
-  program: /usr/bin/zsh
+  program: zsh
   #  args:
   #    - --login
   # Startup directory