fix: checkboxes in theme config window (#2172)

* fix: checkboxes in theme config window

CTFd/themes/admin/assets/js/pages/configs.js

@@ -454,9 +454,8 @@ $(() => {
         case "radio":
         case "checkbox":
           ctrl.each(function() {
-            if ($(this).attr("value") == value) {
             $(this).attr("checked", value);
-            }
+            $(this).attr("value", value);
           });
           break;
         default: