fix(hyprland): use valid touchpad tap key

configs/nixos/modules/desktop/session/hyprland/default.nix

@@ -42,7 +42,7 @@
             accel_profile = "flat";
             touchpad = {
               natural_scroll = true;
-              tap-to-click = true;
+              tap_to_click = true;
               disable_while_typing = true;
             };
           };