logitech-udev-rules: truly minor permission fix

pkgs/os-specific/linux/logitech-udev-rules/default.nix

···
   inherit (solaar) version;
 
   buildCommand = ''
-    install -Dm644 -t $out/etc/udev/rules.d ${solaar.src}/rules.d/*.rules
+    install -Dm444 -t $out/etc/udev/rules.d ${solaar.src}/rules.d/*.rules
   '';
 
   meta = with lib; {