chore: fix all typos (#9053)

src/index-bar/demo/index.vue

@@ -1,5 +1,5 @@
 <template>
-  <van-tabs v-model="activeTab">
+  <van-tabs v-model:active="activeTab">
     <van-tab :title="t('basicUsage')">
       <van-index-bar>
         <div v-for="index in indexList" :key="index">

src/index-bar/test/__snapshots__/demo.spec.ts.snap

@@ -1,9 +1,7 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`should render demo and match snapshot 1`] = `
-<div class="van-tabs van-tabs--line"
-     modelvalue="0"
->
+<div class="van-tabs van-tabs--line">
   <div class="van-tabs__wrap">
     <div role="tablist"
          class="van-tabs__nav van-tabs__nav--line"