Changed system to aarch64-darwin (Apple Silicon)

Had to disable Starship for now, because it doesn't currently build on Apple Silicon
NixOS/nixpkgs#160876

flake.nix

@@ -32,7 +32,7 @@
         configuration = {
           imports = [self.homeManagerModule];
         };
-        system = "x86_64-darwin";
+        system = "aarch64-darwin";
         homeDirectory = "/Users/boli";
         username = "boli";
       };

modules/common.nix

@@ -20,17 +20,17 @@
 
     # Starship Prompt
     # https://rycee.gitlab.io/home-manager/options.html#opt-programs.starship.enable
-    starship = {
-      enable = true;
-      enableZshIntegration = false;
-      enableFishIntegration = true;
-      # Configuration is written to ~/.config/starship.toml
-      settings = {
-        directory.truncate_to_repo = false; # show the path above the current repo too
-        directory.fish_style_pwd_dir_length = 1; # turn on fish directory truncation
-        directory.truncation_length = 3; # number of directories not to truncate
-      };
-    };
+#    starship = {
+#      enable = true;
+#      enableZshIntegration = false;
+#      enableFishIntegration = true;
+#      # Configuration is written to ~/.config/starship.toml
+#      settings = {
+#        directory.truncate_to_repo = false; # show the path above the current repo too
+#        directory.fish_style_pwd_dir_length = 1; # turn on fish directory truncation
+#        directory.truncation_length = 3; # number of directories not to truncate
+#      };
+#    };
 
     # Bat, a substitute for cat.
     # https://github.com/sharkdp/bat