docs: update cli

docs/quickstart-cli.md

@@ -28,6 +28,9 @@ npm install -g @vue/cli
     ```shell
     npx degit dcloudio/uni-preset-vue#vite my-vue3-project
     ```
+    ```shell
+    npx degit dcloudio/uni-preset-vue#vite-alpha my-vue3-project
+    ```
   * 创建以 typescript 开发的工程（如命令行创建失败，请直接访问 [gitee](https://gitee.com/dcloud/uni-preset-vue/repository/archive/vite-ts.zip) 下载模板）
     ```shell
     npx degit dcloudio/uni-preset-vue#vite-ts my-vue3-project