docs(rpi5): fix stale features.nix path in comment

hosts/RPi5/configuration.nix

@@ -17,7 +17,7 @@
 
   # Headless server: the Sway desktop is intentionally not set up. modules/sway.nix is
   # not imported and features.swayDesktop.enable defaults to false (declared in
-  # system/modules/features.nix), so this host keeps plain TTY/SSH login.
+  # modules/features.nix), so this host keeps plain TTY/SSH login.
 
   # Raspberry Pi boots via U-Boot + extlinux, not GRUB/systemd-boot. The
   # raspberry-pi-5 nixos-hardware profile supplies the kernel, firmware and

modules/sway.nix

@@ -12,7 +12,7 @@ let
 in
 {
   # The features.swayDesktop.enable option is declared in
-  # system/modules/features.nix (so headless hosts can read/set it without
+  # modules/features.nix (so headless hosts can read/set it without
   # importing this module). This module only provides its implementation.
   config = lib.mkIf cfg.enable {
     programs.sway = {

modules/users.nix

@@ -29,10 +29,10 @@
     // lib.optionalAttrs (spec ? linger) { inherit (spec) linger; }
   ) hostUsers;
 
-  programs.firefox = lib.mkIf (config.features.swayDesktop.enable == true) {
+  programs.firefox = lib.mkIf config.features.swayDesktop.enable {
     enable = true;
   };
-  programs.thunderbird = lib.mkIf (config.features.swayDesktop.enable == true) {
+  programs.thunderbird = lib.mkIf config.features.swayDesktop.enable {
     enable = true;
   };
 }