feat(home): add backupFileExtension

Author: yunfachi

modules/config/home.nix

@@ -13,9 +13,10 @@
   home-manager = {
     useUserPackages = true;
     useGlobalPkgs = true;
+    backupFileExtension = "hmbackup";
 
     users."${username}" = {
-      home.stateVersion = "24.05";
+      home.stateVersion = "24.11";
     };
   };
 }