[example]: updated example of antd-crud-table by passing class name only instead of instance;

Author: maifeeulasad

src/component/landing/Landing.tsx

@@ -110,7 +110,7 @@ const UserTable = () => {
         title="User Management"
         rowKey="id"
         defaultPageSize={10}
-        service={new UserService()}
+        service={UserService}
         columns={[
           {
             dataIndex: 'name',