docs: update demo.

Author: leezng

.github/workflows/gh-pages.yml

@@ -2,8 +2,8 @@ name: Gh Pages
 
 on:
   push:
-    branches: 
-      - "master"
+    branches:
+      - 'dev'
 
 jobs:
   build-and-deploy:

example/SelectControl.vue

@@ -154,7 +154,7 @@ export default defineComponent({
       state.itemData = !data ? data + '' : data; // 处理 data = null 的情况
     };
 
-    const handleChange = (newVal, oldVal) => {
+    const handleChange = () => {
       // console.log('newVal: ', newVal, ' oldVal: ', oldVal);
     };