fix: onValuesChange should not return store

[zombieJ]

resolve ant-design/ant-design#26801

[codecov]

Codecov Report

Merging #199 into master will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #199   +/-   ##
=======================================
  Coverage   99.89%   99.89%           
=======================================
  Files          13       13           
  Lines         912      912           
  Branches      209      197   -12     
=======================================
  Hits          911      911           
  Misses          1        1           

Impacted Files	Coverage Δ
src/useForm.ts	99.70% <100.00%> (ø)

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