fix(Tab): add key when render TabsTitle (#10392)

* fix(Tab): add key when render TabsTitle

* fix(Tab): change key

* fix(Tabs): use each TabRef.id as key

packages/vant/src/tabs/Tabs.tsx

@@ -365,6 +365,7 @@ export default defineComponent({
     const renderNav = () =>
       children.map((item, index) => (
         <TabsTitle
+          key={item.id}
           v-slots={{ title: item.$slots.title }}
           id={`${id}-${index}`}
           ref={setTitleRefs(index)}