treewide: add missing .s to extensions (#1165)

This fixes the issue mentioned at https://github.com/danth/stylix/pull/1164#pullrequestreview-2789195255

Link: https://github.com/danth/stylix/pull/1165

Reviewed-by: awwpotato <awwpotato@voidq.com>

modules/fcitx5/hm.nix

@@ -17,15 +17,15 @@
             # Copyright (c) 2024, sanweiya
             "fcitx5/themes/stylix/highlight.svg".source = config.lib.stylix.colors {
               template = ./highlight.svg.mustache;
-              extension = "svg";
+              extension = ".svg";
             };
             "fcitx5/themes/stylix/panel.svg".source = config.lib.stylix.colors {
               template = ./panel.svg.mustache;
-              extension = "svg";
+              extension = ".svg";
             };
             "fcitx5/themes/stylix/theme.conf".source = config.lib.stylix.colors {
               template = ./theme.conf.mustache;
-              extension = "conf";
+              extension = ".conf";
             };
           };
         };

modules/firefox/hm.nix

@@ -93,7 +93,7 @@ in
               let
                 template = config.lib.stylix.colors {
                   template = ./userChrome.css.mustache;
-                  extension = "css";
+                  extension = ".css";
                 };
               in
               ''

modules/gedit/hm.nix

@@ -3,7 +3,7 @@
 let
   style = config.lib.stylix.colors {
     template = ./template.xml.mustache;
-    extension = "xml";
+    extension = ".xml";
   };
 
 in

modules/gnome-text-editor/overlay.nix

@@ -2,7 +2,7 @@
 let
   style = config.lib.stylix.colors {
     template = ../gedit/template.xml.mustache;
-    extension = "xml";
+    extension = ".xml";
   };
 in
 {

modules/gnome/theme.nix

@@ -9,7 +9,7 @@
 let
   colorsScss = colors {
     template = ./colors.scss.mustache;
-    extension = "scss";
+    extension = ".scss";
   };
 
 in

modules/gtk/hm.nix

@@ -11,7 +11,7 @@ let
 
   baseCss = config.lib.stylix.colors {
     template = ./gtk.css.mustache;
-    extension = "css";
+    extension = ".css";
   };
 
   finalCss = pkgs.runCommandLocal "gtk.css" { } ''

modules/qt/hm.nix

@@ -53,7 +53,7 @@
           };
           svg = config.lib.stylix.colors {
             template = ./kvantum.svg.mustache;
-            extension = "svg";
+            extension = ".svg";
           };
         in
         pkgs.runCommandLocal "base16-kvantum" { } ''