👽 Fix markup of checkboxes with help text

Left-over from the Django 4.2 upgrade where the HTML was changed.

This ensures the help text is below the checkbox, rather than next to
it with some awkward horizontal space between.

src/openforms/js/components/admin/forms/Inputs.js

@@ -102,19 +102,23 @@ const Checkbox = ({name, label, helpText, noVCheckbox = false, ...extraProps}) =
   name = prefix ? `${prefix}-${name}` : name;
   const idFor = disabled ? undefined : `id_${name}`;
   return (
-    <div
-      className={classNames('flex-container', 'checkbox-row', {'checkbox-row--disabled': disabled})}
-    >
-      <input type="checkbox" name={name} id={idFor} {...extraProps} />{' '}
-      <label className={classNames('inline', {vCheckboxLabel: !noVCheckbox})} htmlFor={idFor}>
-        {label}
-      </label>
-      {helpText ? (
+    <>
+      <div
+        className={classNames('flex-container', 'checkbox-row', {
+          'checkbox-row--disabled': disabled,
+        })}
+      >
+        <input type="checkbox" name={name} id={idFor} {...extraProps} />{' '}
+        <label className={classNames('inline', {vCheckboxLabel: !noVCheckbox})} htmlFor={idFor}>
+          {label}
+        </label>
+      </div>
+      {helpText && (
         <div className="help">
           <div>{helpText}</div>
         </div>
-      ) : null}
-    </div>
+      )}
+    </>
   );
 };