fix(useWindowScroll): use scrollX instead of pageXOffset

[okxiaoliang4]

Warning: ⚠️ Slowing down new functions

Due to the growing audience of VueUse, we received a huge amount of feature requests and pull requests. It's become harder and harder and recently a bit beyond our capacity to maintain the project. In the near future, we could like slowing down on accepting new features and prioritize the stability and quality of existing functions. New functions to VueUse may not be accpected. If you come up some new ideas, we advice you to have them in your codebase first instead of proposing to VueUse. You may iterate them a few time and see how them suite your needs and how them can be generalized. If you really believe they are useful to the community, you can create PR with your usercases, we are still happy to hear and discuss. Thank you for your understanding.

Description

see #2726.
I think we should keep the useWindowScroll.This PR revert this #2659 and use the window.scrollX window.scrollY to replace window.pageXOffset and window.pageYOffset, because they are depercated.

Additional context

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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