fix: 解决微信小程序滚动报错问题

src/packages/elevator/demos/taro/demo2.tsx

@@ -113,7 +113,7 @@ const Demo2 = () => {
   }
   return (
     <Elevator
-      className="test-elevator1"
+      className="test-elevator2"
       list={dataList}
       height="220"
       floorKey={floorKey}

src/packages/elevator/demos/taro/demo3.tsx

@@ -61,6 +61,7 @@ const Demo3 = () => {
   }
   return (
     <Elevator
+      className="test-elevator3"
       showKeys={false}
       list={dataList}
       height="260"

src/packages/elevator/demos/taro/demo4.tsx

@@ -125,6 +125,7 @@ const Demo4 = () => {
   }
   return (
     <Elevator
+      className="test-elevator4"
       list={dataList}
       height="220"
       sticky

src/packages/elevator/demos/taro/demo5.tsx

@@ -62,6 +62,7 @@ const Demo5 = () => {
   }
   return (
     <Elevator
+      className="test-elevator5"
       list={dataList}
       height="260"
       onItemClick={(key: string, item: any) => onItemClick(key, item)}