correct some config

modules/home-manager/terminal/alacritty.nix

@@ -37,11 +37,9 @@ in
             style = "BoldItalic";
           };
         };
-#        colors = {
-#          primary = {
-#            background = "#000000";
-#          };
-#        };
+        cursor = {
+          style = "Underline";
+        };
       };
     };
   };