refactor: 修改模型卡片悬停效果的显示逻辑

- 将悬停时显示不同图片的条件从 `index !== 2` 修改为 `index !== 3`
- 这个修改改变了模型卡片在悬停状态下的视觉效果，使得用户体验更加一致

src/views/Home/components/ModelCard.vue

@@ -12,7 +12,7 @@
         class="view-link"
         @click="$emit('open')">
       <span>{{ getText(model,index) }}</span>
-      <img v-if="hoverIndex === index && index !== 2" src="@/assets/img/home/tob.png" alt="">
+      <img v-if="hoverIndex === index && index !== 3" src="@/assets/img/home/tob.png" alt="">
       <img v-else src="@/assets/img/home/tow.png" alt="">
     </div>
   </div>