When update to v4, the theme cannot modify as expected.

[shiwanjun1995]

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• [ ] I have searched the issues of this repository and believe that this is not a duplicate.

What problem does this feature solve?

when i used v3, i can follow this link to do it.(https://3x.antdv.com/docs/vue/customize-theme) but now v4, it cannot effort some help to me.(https://next.antdv.com/docs/vue/customize-theme-cn)

What does the proposed API look like?

it seems like antd@5, we can modify theme as simple.(https://ant.design/docs/react/customize-theme-cn)