fix(rofi): migrate Home Manager options

configs/nixos/modules/desktop/session/rofi.nix

@@ -28,12 +28,11 @@ in
       # Stylix supplies the Nord theme.
       programs.rofi = {
         enable = true;
-        font = lib.mkForce "JetBrains Mono 12";
-
         # Application launch is the only mode, kept minimal so the prompt opens
         # as fast as rofi can read the desktop entries.
         # Icons are off: resolving one per entry is the bulk of drun's startup.
-        extraConfig = {
+        settings = {
+          font = lib.mkForce "JetBrains Mono 12";
           modi = "drun";
           show-icons = false;
         };