fix: Checklist组件 在ios手机上面 出现点击无效问题

* 地址：https://mint-ui.github.io/docs/#/en2/checklist
* 出现问题：ios软件内嵌H5、使用该组件，出现点击勾选⚪，点击无效。

Start with the Checklist documentation at https://mint-ui.github.io/docs/#/en2/checklist and reproduce the failure in an iOS embedded H5 environment. Compare behavior with a working environment, then identify the Checklist entry point and relevant tests from the repository. Done means the checkbox can be selected reliably on iOS within embedded H5.

Written by the indexing model from the issue text.