fix(example): 修复文档中vue3自定义组件不能正常显示bug

[zkt2002]

昨天把项目拉下来想尝试使用vue3自定义组件，但是发现该组件无法正常显示

将 flowId 传递给 TeleportContainer 之后可以修复该问题

[changeset-bot]

⚠️ No Changeset found

Latest commit: 1d2037a

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