message: docs: update cdn version to 2.5
diff: @@ -97,11 +97,11 @@ The easiest way to use Vant is to include a CDN link in the html file, after whi
  ```html
  <!-- import style -->
  -<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/vant@2.4/lib/index.css">
  +<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/vant@2.5/lib/index.css">
  <!-- import script -->
  <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.min.js"></script>
  -<script src="https://cdn.jsdelivr.net/npm/vant@2.4/lib/vant.min.js"></script>
  +<script src="https://cdn.jsdelivr.net/npm/vant@2.5/lib/vant.min.js"></script>
  <script>
  // Render the Button component
  