feat(useAxios): improve type of data

[GODLiangCY]

Description

the type of the returned data should be shallowRef rather than Ref, as it's declared here

closes #2251

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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[GODLiangCY]

This PR was closed because #2251 gives a better solution