misleading document after v4 release

[tmokmss]

Describe the bug

Hi I'm very new to React Query and I found a misleading description in README.

https://github.com/TanStack/query/blob/e6df356edd5ce3d9d93eabbc7c15af68cdd2eb30/README.md?plain=1#L31-L34

According to release pages, v4 is not in beta any more and the link to v4 document should be https://tanstack.com/query/v4

Your minimal, reproducible example

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Steps to reproduce

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Expected behavior

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How often does this bug happen?

No response

Screenshots or Videos

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Platform

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react-query version

4.0.10

TypeScript version

No response

Additional context

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