chore(demo): 更新demo

Author: klook-tech-jinoliu

packages/demo/demo-v3/src/pages/index/views/Demo/index.vue

@@ -450,7 +450,7 @@ export default {
                     inlineFooter: false,
                     labelColSpan: 6,
                     wrapperColSpan: 16,
-                    layoutColumn: 2,
+                    layoutColumn: 1,
                     // defaultSelectFirstOption: false
                 },
             };